CN114530093B - Display module, driving method of display device and display device - Google Patents
Display module, driving method of display device and display device Download PDFInfo
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- CN114530093B CN114530093B CN202111604728.1A CN202111604728A CN114530093B CN 114530093 B CN114530093 B CN 114530093B CN 202111604728 A CN202111604728 A CN 202111604728A CN 114530093 B CN114530093 B CN 114530093B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003086 colorant Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 11
- 238000005538 encapsulation Methods 0.000 claims description 14
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 9
- 230000001965 increasing effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 108010043121 Green Fluorescent Proteins Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133624—Illuminating devices characterised by their spectral emissions
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/3413—Details of control of colour illumination sources
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application discloses a display module, a driving method of a display device and the display device. The display module comprises a first dimming component, namely a display panel and a backlight module which are oppositely arranged. The display panel comprises a second display area and a first display area at least partially surrounding the second display area, wherein the first display area comprises a first red sub-pixel, a first green sub-pixel and a first blue sub-pixel, and the second display area comprises a second red sub-pixel, a second green sub-pixel, a second blue sub-pixel and a white sub-pixel; the backlight module is provided with a containing cavity for placing the photosensitive device; the first dimming components are circumferentially distributed along the periphery of the accommodating cavity and comprise a plurality of first dimming units and a plurality of second dimming units, the luminous colors of the first dimming units are different from the luminous colors of the second dimming units, and the light emitting surface of each first dimming unit is covered with a layer of fluorescent powder. The color saturation of the second display area can be enlarged, so that the color gamut of the first display area and the color gamut of the second display area are consistent.
Description
Technical Field
The invention relates to the field of display, in particular to a display module, a driving method of a display device and the display device.
Background
The full screen is becoming the mainstream because its screen ratio can reach more than 90%. The full screen is provided with the photosensitive devices such as the camera, the flash lamp, the infrared sensor or the fingerprint identification module and the like under the screen, so that a higher screen duty ratio is obtained. Although the existing photosensitive device can be hidden under the screen, the corresponding area of the camera arranged on the display screen is inconsistent with other areas of the display screen in display effect.
Disclosure of Invention
The invention provides a display module, a driving method of a display device and the display device, which realize that the display effect of an image pickup area and other areas of a display screen are consistent.
In a first aspect, an embodiment of the present application provides a display module, including:
the display panel comprises a first display area and a second display area, wherein the first display area at least partially surrounds the second display area, the first display area comprises a first red sub-pixel, a first green sub-pixel and a first blue sub-pixel, and the second display area comprises a second red sub-pixel, a second green sub-pixel, a second blue sub-pixel and a white sub-pixel;
the backlight module is positioned at one side of the display panel and is provided with a containing cavity, the containing cavity is used for containing the photosensitive device, the containing cavity extends along the thickness direction of the backlight module, and the projection of the containing cavity in the thickness direction of the backlight module is overlapped with the projection of the second display area in the thickness direction of the backlight module;
the first dimming components are arranged along the periphery of the accommodating cavity in a surrounding mode, the first dimming components comprise a plurality of first dimming units and a plurality of second dimming units, the luminous colors of the first dimming units are different from the luminous colors of the second dimming units, each light emitting surface of each first dimming unit is covered with a layer of fluorescent powder, and at least one second dimming unit is arranged between every two adjacent first dimming units.
In a second aspect, an embodiment of the present application further provides a driving method of a display device, configured to drive the display module, where the driving method includes:
controlling the first dimming component and the second display area to emit light under the condition that the photosensitive device is not started;
and under the condition that the opening of the photosensitive device is detected, controlling the first dimming component and the second display area to emit no light.
In a third aspect, an embodiment of the present application further provides a display device, including a photosensitive device and the display module, where the photosensitive device is located in an area formed by surrounding the first dimming component of the display module.
The backlight module and the display device provided by the application have the following beneficial effects: the light-emitting surface of the first dimming unit is covered with a layer of fluorescent powder, namely the fluorescent powder covered on the light-emitting surface of the first dimming unit is excited by the first dimming unit with higher luminous efficiency, so that peaks of two different colors are obtained. So that the peak heights of both color peaks approach the ideal peak height. And mixing the light rays emitted by the second dimming unit with the light rays emitted by the first dimming unit, and enabling the color of the second dimming unit to be different from the color of the first dimming unit so as to enable the mixed light rays to be white light. And the obtained white light has three color peaks, and the peak height of each color peak is close to the ideal peak height, so that the color gamut of the first dimming component is enlarged. When the first dimming component is used for providing a light source for the second display area, the color saturation of the second display area can be enlarged, so that the color gamuts of the first display area and the second display area are consistent, and full-screen display is realized.
Drawings
Objects and advantages will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like or similar reference characters designate like or similar features, and in which the drawings are not to scale.
Fig. 1 is a top view of a display module provided according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 3 is a schematic view showing a partial structure of a display panel according to an embodiment of the present invention;
fig. 4 is a top view of a display module according to another embodiment of the present invention;
FIG. 5 is a cross-sectional view taken along the direction B-B of FIG. 1;
fig. 6 is a cross-sectional view of a display module provided according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a first dimming component according to an embodiment of the present invention;
fig. 8 is a schematic view showing a partial structure of a display panel according to another embodiment of the present invention;
fig. 9 is a schematic view showing a partial structure of a display panel according to another embodiment of the present invention;
fig. 10 is a schematic structural view of a first dimming component according to another embodiment of the present invention;
fig. 11 is a schematic structural view of a first dimming component according to another embodiment of the present invention;
FIG. 12 is a top view of a display device according to another embodiment of the present invention;
fig. 13 is a cross-sectional view of fig. 1 taken along the direction C-C.
In the drawings, the drawings are not necessarily to scale.
Marking:
10. a display module; 11. a display panel; DA1, a first display area; DA2, a second display area; 111. a first red subpixel; 112. a first green sub-pixel; 113. a first blue sub-pixel; 114. a second red subpixel; 115. a second green sub-pixel; 116. a second blue sub-pixel; 117. a white subpixel; 12. a backlight module; 121. a receiving chamber; 13. a first dimming component; 131. a first dimming unit; 132. a second dimming unit; 133. a light-emitting surface; 134. fluorescent powder; 135. a third dimming unit; 14. a second dimming component; 15. a light guide plate; 16. an encapsulation layer; 20. a photosensitive device; 100. a display device.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below with reference to the accompanying drawings and detailed description, in which the invention is shown and described in detail. It should be understood that the specific embodiments described herein are merely configured to illustrate the invention and are not configured to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It will be understood that when an element is referred to as being "on" or "over" another layer, it can be directly on or comprise the other layer. And if the component is flipped, one of the layers, one of the regions, will be located "under" or "beneath" the other layer, another of the regions.
The embodiment of the application provides a display module, which comprises a display panel, wherein the display panel can be a liquid crystal display panel (Liquid Crystal Display, LCD). The display module of the embodiments of the present application may be presented in various forms, and some examples will be described below.
As shown in fig. 1 to 3, a display module is provided in an embodiment of the present application. Fig. 1 is a top view of a display module, fig. 2 is a cross-sectional view of fig. 1 along A-A direction, and fig. 3 is a schematic view of a partial structure of a display panel.
The display module 10 includes a display panel 11, a backlight module 12, and a first dimming component 13. The display panel 11 includes a first display area DA1 and a second display area DA2, the first display area DA1 at least partially surrounds the second display area DA2, the first display area DA1 includes a first red sub-pixel 111, a first green sub-pixel 112 and a first blue sub-pixel 113, and the second display area DA2 includes a second red sub-pixel 114, a second green sub-pixel 115, a second blue sub-pixel 116 and a white sub-pixel 117.
The backlight module 12 is positioned at one side of the display panel 11 and has a receiving cavity 121. The accommodating cavity 121 is used for accommodating the photosensitive device 20, the accommodating cavity 121 may extend along the thickness direction of the backlight module 12, and the projection of the accommodating cavity 121 in the thickness direction of the backlight module 12 and the projection of the second display area DA2 in the thickness direction of the backlight module 12 overlap.
The first dimming components 13 are circumferentially arranged along the periphery of the accommodating cavity 121, the first dimming components 13 comprise a plurality of first dimming units 131 and a plurality of second dimming units 132, the luminous colors of the first dimming units 131 and the luminous colors of the second dimming units 132 are different, the light emitting surface 133 of each first dimming unit 131 is covered with a layer of fluorescent powder 134, and at least one second dimming unit 132 is arranged between two adjacent first dimming units 131.
The first dimming unit 131 and the second dimming unit 132 provided in the embodiments of the present application may be a Micro light emitting diode display (Micro Light Emitting Diode Display, micro LED) or Mini LED, etc. For example, the first light modulation component 13 may be a blue LED, and the light emitting surface 133 of the blue LED is covered with a layer of green phosphor 134, and the second light modulation component 14 may be a red light emitting chip. Of course, the first light modulation component 13 may be a blue LED, and the light emitting surface 133 of the blue LED is covered with a layer of red phosphor 134, and the second light modulation component 14 may be a green light emitting chip, which is not illustrated here.
Regarding the arrangement of the first dimming components 13 around the periphery of the accommodating cavity 121, the first dimming units 131 and the second dimming units 132 may be arranged in a crossed manner, or one or more second dimming units 132 may be disposed between two adjacent first dimming units 131, and so on.
The display module 10 provided in the embodiment of the present application may be an under-screen camera structure, and the backlight module 12 is located on the backlight side of the display panel 11. In the thickness direction perpendicular to the backlight module 12, the backlight module 12 has a receiving cavity 121, and the opening direction of the receiving cavity 121 is consistent with the thickness direction of the backlight module 12. The accommodating cavity 121 may be a space formed inside the backlight module 12, or may be disposed to penetrate the backlight module 12.
Referring to fig. 2, the accommodating cavity 121 is an internal space of the backlight module 12. A photosensitive device 20, such as a camera, may be disposed within the receiving cavity 121. The photosensitive surface of the photosensitive device 20 is disposed toward the opening direction of the accommodating chamber 121. The display panel 11 includes a first display area DA1 and a second display area DA2, and a projection of the accommodation cavity 121 in the thickness direction of the backlight unit 12 and a projection of the second display area DA2 in the thickness direction of the backlight unit 12 overlap. The first dimming component 13 is disposed outside the accommodating cavity 121 and circumferentially arranged along the periphery of the accommodating cavity 121. Wherein, the first display area DA1 and the second display area DA2 each include red sub-pixels, green sub-pixels, and blue sub-pixels. In addition, the second display area DA2 further includes a white subpixel 117. The light transmittance of the second display area DA2 is improved by the white subpixel 117 being disposed.
When the photosensitive device 20 is used, the sub-pixels of the first display area DA1 emit light, the sub-pixels of the second display area DA2 do not emit light, and the first dimming component 13 does not emit light. So as to avoid the interference of the light emitted by the second display area DA2 and the first dimming component 13 on the photosensitive device 20, thereby affecting the operation of the photosensitive device 20. When the photosensitive device 20 is not required to be used, each of the sub-pixels of the first and second display areas DA1 and DA2 emits light, and the first dimming component 13 also emits light. Since the white sub-pixel 117 is provided in the second display area DA2, the light transmittance of the second display area DA2 is greater than that of the first display area DA1, and the two display areas are not uniform in color of the displayed screen under the same light source. Therefore, the light emitting surface of the first light modulating unit 131 is covered with a layer of fluorescent powder, that is, the fluorescent powder covered on the light emitting surface is excited by the first light modulating unit 131 with higher luminous efficiency, so that peaks of two different colors are obtained. So that the peak heights of both color peaks approach the ideal peak height. The light emitted by the second dimming unit 132 and the light emitted by the first dimming unit 131 are mixed, and the color of the second dimming unit 132 is different from the color of the first dimming unit 131, so that the mixed light is white light. And the obtained white light has three color peaks, each of which has a peak height close to an ideal peak height, thereby expanding the color gamut of the first dimming component 13. So that when the first dimming component 13 is used for providing a light source for the second display area DA2, the color saturation of the second display area DA2 can be enlarged, so that the color gamuts of the first display area DA1 and the second display area DA2 are consistent, and further, full-screen display is realized.
It should be noted that fig. 2 in the embodiment of the present application only schematically illustrates that the structure of the accommodating cavity 121 is cylindrical, but is not limited to this shape, and the structure of the accommodating cavity 121 may be other shapes, which is not limited herein. The specific structures of the backlight module 12 and the display panel 11 are not limited to the above structures, and the specific structures can be understood with reference to the structures of the liquid crystal display device in the related art, for example, the backlight module 12 may further include an optical film material such as a backlight source, a brightness enhancing sheet, a reflective sheet, and the like, and the display panel 11 may further include an array substrate, a color film substrate, a liquid crystal layer therebetween, and the like, which are oppositely disposed, and the embodiments of the present application will not be repeated herein.
As shown in fig. 4 and 5, in some embodiments, the backlight module 12 further includes a second dimming component 14. Fig. 4 is a top view of a display module according to an embodiment of the present application, and fig. 5 is a cross-sectional view of fig. 4 along a direction B-B. In the present embodiment, the accommodating cavity 121 is formed inside the backlight module 12, and the light guide plate 15 is disposed at the opening of the accommodating cavity 121. The second dimming component 14 is disposed beside the light guide plate 15, and the projection of the second dimming component 14 in the thickness direction of the backlight module 12 and the projection of the first display area DA1 in the thickness direction of the backlight module 12 overlap each other, and the half-width value of the second dimming component 14 is greater than the half-width value of the first dimming component 13.
When the photosensitive device 20 is turned off, the first display area DA1 and the second display area DA2 both display pictures. The second dimming component 14 serves as a light source of the first display area DA1, and the first dimming component 13 serves as a light source of the second display area DA 2. Since the second display area DA2 includes the white sub-pixel 117, in order to ensure that the display effects of the first display area DA1 and the second display area DA2 are uniform. The relationship between the first dimming component 13 and the second dimming component 14 may be set according to the relationship in which the half-width value and the color gamut are inversely proportional. Because the larger the half-width value, the smaller the color gamut. Therefore, the half-width value of the first light modulation component 13 is smaller than the half-width value of the second light modulation component 14, so as to enlarge the color saturation of the first light modulation component 13, thereby solving the problem that the color saturation of the second display area DA2 is lower than that of the first display area DA1 due to the arrangement of the white sub-pixels 117 in the second display area DA2, and further realizing the consistency of the color saturation of the first display area DA1 and the second display area DA 2.
In order to increase the color saturation of the second display area DA2, the first dimming component 13 may be further improved.
As shown in fig. 6, in some embodiments, the display module 10 further includes an encapsulation layer 16, the encapsulation layer 16 is located on the light emitting side of the first dimming component 13, when the number of the first dimming units 131 and the second dimming units 132 are equal, the interval L between two adjacent dimming units, and the interval H between the surface of the first dimming component 13 facing the encapsulation layer 16 and the encapsulation layer 16, where H is equal to or greater than L/tan75 °.
Assuming that the number of the first dimming units 131 and the number of the second dimming units 132 are equal, the red light peak, the green light peak and the blue light peak of the emitted light are all highest. At this time, a distance L between two adjacent dimming cells. The distance between the encapsulation layer 16 and the light emitting surface 133 of the first dimming component 13 may be determined according to the distance L. To avoid too small a distance between the encapsulation layer 16 and the first dimming component 13, so that the light emitted from the light emitting surface 133 of the first dimming component 13 reaches the encapsulation layer 16 quickly or reaches the encapsulation layer 16 without reaching the encapsulation layer 16, thereby making the adjacent two dimming units darker. And further, the phenomenon of lower color saturation occurs when the second display area DA2 displays.
According to the actual number of the dimming units, the distance between the light emitting surface 133 of each dimming unit and the packaging layer 16 is adjusted, so that the light emitted by each dimming unit is emitted from the packaging layer 16 after passing through a period of time, and the color saturation of the second display area DA2 is further improved. In addition, the above manner simplifies the structure, and the color saturation of the second display area DA2 can be achieved only by adjusting the dimming unit and the encapsulation layer 16.
It should be noted that, the second dimming component 14 may also have a similar structure to implement adjustment of the color saturation of the first display area DA 1. Of course, the second dimming component 14 may also adjust the color saturation in other manners, which will not be described in detail herein.
It is easy to understand that the light emitted by the first dimming component 13 as a light source has an emission spectrum with intensity peaks of three colors of red, green and blue. When the color gamut reaches the maximum value, the peak heights of the three peaks are all at the maximum value. However, in practical situations, the peak heights of the three peaks cannot reach the ideal peak height at the same time. In order to make the peak heights of the three peaks of the light emitted by the first dimming component 13 approach to the ideal peak height, the first dimming unit 131 and the second dimming unit 132 of the first dimming component 13 may be adjusted.
For convenience of explanation, the first dimming unit 131 is a blue LED, the light emitting surface 133 of the blue LED is covered with the red phosphor 134, and the second dimming unit 132 is a green light emitting chip.
In an embodiment, the ideal peak height of the second dimming unit 132 is H1, the actual peak height of the second dimming unit 132 is H2, when the number of the first dimming unit 131 and the second dimming unit 132 are equal, the number of the second dimming units 132 is N, and the actual setting number of the second dimming units 132 is N, N is greater than or equal to N (H1/H2).
Firstly, according to the relationship that the numbers of the first dimming units 131 and the second dimming units 132 are equal in an ideal state, the numbers of the first dimming units 131 and the second dimming units 132 are initially determined, so that the initial numbers of the first dimming units 131 and the second dimming units 132 are n, that is, the numbers of the blue LEDs and the green light emitting chips are n.
Assuming that the peak heights of the red light peak and the blue light peak of the light obtained by mixing at this time reach the ideal peak height, and the peak height of the green light peak does not reach the ideal peak height, the number of the green light emitting chips can be adjusted according to the relation between the peak height H2 actually measured by the green light peak and the number of the green light chips. The actual number N of the second dimming units 132 is set to be n×n (H1/H2) so as to enhance the light emitting intensity of the green light chip, so that the peak height of the adjusted green light peak is close to the ideal peak height, and the color gamut of the second display area DA2 is further improved.
Fig. 7 shows a schematic structural diagram of a first dimming component 13 according to an alternative embodiment of the present application. In this embodiment, the first dimming unit 131 is a blue LED, the light emitting surface of the blue LED is covered with red phosphor, and the second dimming unit 132 is a green light emitting chip. The first dimming units 131 and the second dimming units 132 are circumferentially arranged in a cross arrangement, but two second dimming units 132 are disposed between two adjacent first dimming units 131.
Second, the light emitting intensity of each dimming unit can be adjusted by adjusting the areas of the light emitting surfaces 133 of the first dimming unit 131 and the second dimming unit 132, so that the peak heights of the peaks of each color reach the ideal peak height.
For example, in the embodiment shown in fig. 8, when the area of the light emitting surface 133 of the first dimming unit 131 and the area of the light emitting surface 133 of the second dimming unit 132 are equal, and are both S2. The peak heights of the blue light peak and the red light peak of the light emitted from the blue light LED (i.e., the first dimming unit 131) reach the ideal peak height H1, and the peak height of the green light peak of the light emitted from the green light emitting chip (i.e., the second dimming unit 132) does not reach the ideal peak height.
In order to make the peak height of the green light peak approach the ideal peak height H1, the area of the light emitting surface 133 of the second adjustment unit 132 may be adjusted to S1, and S1 may be made larger than S2.
That is, the area of the light emitting surface 133 of the second dimming unit 132 is enlarged to increase the light emitting amount of the second dimming unit 132, thereby increasing the light emitting intensity of the second dimming unit 132. The area adjustment manner of the light emitting surface 133 of the second dimming unit 132 may be determined according to the relationship between the peak height H2 actually measured by the green light peak and the ideal peak height H1, such that S1 and S2 satisfy s1/s2=h1/H2. So that the light emitted by the adjusted second dimming unit 132 has a peak height reaching the desired peak height. That is, the purpose of improving the color gamut of the light emitted by the chip is achieved by increasing the light emitting surface area of the chip.
Of course, in some embodiments, the projection shape of the second dimming unit 132 in the light emitting direction may be rectangular or trapezoidal. By changing the shape of the area of the light emitting surface 133 of the second light adjusting unit 132, the area of the light emitting surface 133 of the second light adjusting unit 132 is increased, and the light emitting amount of the light emitting surface 133 of the second light adjusting unit 132 is further increased.
The projection shape of the second light adjusting unit 132 is not limited to the above shape, and the shape of the light emitting surface 133 of the second light adjusting unit 132 may be determined according to the actual situation, as long as the area of the light emitting surface 133 of the second light adjusting unit 132 can be increased. The projection shape of the second dimming cell 132 is not particularly limited herein.
Secondly, when the peak heights of the blue light peak and the red light peak do not reach the ideal peak height, the number of blue light LEDs and the area of the light emitting surface 133 of the blue light LEDs can be adjusted according to the relation between the peak height value actually measured by the blue light peak or the red light peak and the ideal peak height, so that the brightness of the blue light LEDs is enhanced, and the peak height of the blue light peak or the red light peak reaches the ideal peak height.
In some embodiments, as shown in fig. 9, the first display area DA1 includes a first red sub-pixel 111, a first green sub-pixel 112, and a first blue sub-pixel 113, and the second display area DA2 also includes a second red sub-pixel 114, a second green sub-pixel 115, and a third blue sub-pixel. The projection areas of the first red sub-pixel 111, the first green sub-pixel 112, the first blue sub-pixel 113, the second red sub-pixel 114 and the second blue sub-pixel 116 in the thickness direction of the display panel 11 are equal, and are S3. The projected area of the second green sub-pixel 115 of the second display area DA2 in the thickness direction of the display panel 11 is S4, and S4 is greater than S3. And the relation S4/S3> H1/H2 between the projected area S3 of the first green subpixel 112 and the projected area S4 of the second green subpixel 115.
That is, the projected area of the first green sub-pixel 112 of the first display area DA1 is smaller than the projected area of the second green sub-pixel 115 of the second display area DA 2. The projection area of the second green sub-pixel 115 in the second display area DA2 is made larger than the projection area of the first green sub-pixel 112 in the first display area DA1 by setting the projection areas of all the sub-pixels in the thickness direction of the display panel 11 to be equal for all the sub-pixels in the first display area DA1 and the second display area DA2, so that the density of the display screen in the second display area DA2 can be appropriately increased.
In addition to the increase in the area of the light emitting surface 133 of the sub-pixel unit of the second display area DA2, the color saturation of the second display area DA2 can be increased by changing the projected area of the white sub-pixel 117 of the second display area DA2 in the thickness direction of the display panel 11.
With continued reference to fig. 9, in this embodiment, the projection area of a portion of the second green sub-pixel 115 of the second display area DA2 in the thickness direction of the display panel 11 may be S4, and the projection area of a portion of the white sub-pixel 117 located beside the second green sub-pixel 115 with the projection area S4 in the thickness direction of the display panel 11 may be S5, so that S5< S4 may be achieved. That is, the area of the white subpixel 117 is reduced, thereby reducing the light transmittance of the second display area DA2 and increasing the density of the display screen of the second display area DA 2.
It should be noted that, in addition to the projection area of the white subpixel 117 located beside the second green subpixel 115, the projection areas of the white subpixels 117 located beside the second red subpixel 114 and the second green subpixel 115 may be adjusted, and the projection areas of the red or green subpixels disposed correspondingly thereto may be adjusted, which is not specifically described herein.
In some embodiments, the first dimming unit 131 is a blue light emitting chip, the phosphor 134 covered on the blue light emitting chip is red, and the second dimming unit 132 is a green light emitting chip.
When the blue light emitting chip emits light, the red fluorescent powder 134 can be excited to emit light, and the light emitted by the green light emitting chip is mixed to form white light for emitting. The white light is irradiated onto the light guide plate 15 as a light source of the second display area DA2, and is emitted from the second display area DA 2. Based on blue light emitting chip for the life of other light emitting chip longer, it is more energy-conserving in the use moreover, and luminance is also higher. Thus, the service life of the first dimming component 13 can be prolonged by using the blue light emitting chip.
In some embodiments, the light emitting surface of the first light adjusting unit 131 may cover other extended phosphors. Fig. 10 shows a schematic structural diagram of a first dimming component 13 according to another embodiment of the present application.
In this embodiment. The first dimming unit 131 is a blue light emitting chip, the light emitting surface 133 of the blue light emitting chip is covered with the green phosphor 134, and the second dimming unit 132 is a red light emitting chip. . The blue light emitting chips and the red light emitting chips are arranged in a crossing manner. When the LED emits light, the blue light-emitting chip emits light to excite the green fluorescent powder 134 to emit light, and the light emitted by the red light-emitting chip is mixed to form white light. The obtained white light has peaks of three colors while extending the service life of the first dimming component 13.
When the light emitting surface 133 of the first dimming unit 131 is not covered with the phosphor 134, the third dimming unit 135 may be added. Fig. 11 is a schematic structural view of a first dimming component 13 according to another embodiment of the present application.
In this embodiment, the first dimming component 13 has three dimming cells, i.e., a first dimming cell 131, a second dimming cell 132 and a third dimming cell 135, which are different in light emission color, so that white light is obtained by mixed light.
The embodiment of the application also provides a driving method of the display device, which is used for driving the display module 10. The driving method includes controlling the first dimming component 13 and the second display region DA2 to emit light in case the light sensing device 20 is not turned on. In the case where the turning-on of the light sensing device 20 is detected, the first dimming component 13 and the second display area DA2 are controlled not to emit light.
The following describes the driving method using the light sensing device 20 as a camera and using the image capturing function and not using the image capturing function.
When the camera shooting function is used, the camera is started. The light emitting surface 133 of the camera is opposite to the second display area DA2, and the first dimming component 13 and the second display area DA2 are controlled not to emit light at this time, so that the first dimming component 13 can not emit light to affect the image capturing effect of the camera.
When the camera shooting function is not used, the camera is closed. The first dimming component 13, the sub-pixels of the second display area DA2 and the sub-pixels of the first display area DA1 are controlled to emit light so as to realize full screen display.
By controlling the first dimming component 13 and the second display area DA2 to be turned on and off, switching of different functions is achieved, and a driving method is simplified.
In addition, the embodiment of the application further provides a display device, as shown in fig. 12, which includes the photosensitive device 20 and the display module 10, where the photosensitive device 20 is located in the accommodating cavity 121 of the display module 10.
The light reaches the photosensitive device 20 through the accommodating cavity 121 or the light is emitted from the photosensitive device 20 through the accommodating cavity 121, namely, the cavity of the accommodating cavity 121 is used as a light propagation channel, no additional shielding object is arranged, and the loss in the light propagation process is reduced.
As shown in fig. 13, in some embodiments, a camera may be employed as the photosensitive device 20. The camera is disposed in the accommodation chamber 121, and can be hidden below the display panel 11. When the display panel 11 displays, the camera does not occupy part of the display space of the display panel 11, and full-screen display can be realized.
These embodiments are not exhaustive or to limit the invention to the precise embodiments disclosed, and according to the invention described above. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (12)
1. A display module, comprising:
the display panel comprises a first display area and a second display area, wherein the first display area at least partially surrounds the second display area, the first display area comprises a first red sub-pixel, a first green sub-pixel and a first blue sub-pixel, and the second display area comprises a second red sub-pixel, a second green sub-pixel, a second blue sub-pixel and a white sub-pixel;
the backlight module is positioned at one side of the display panel and is provided with a containing cavity, the containing cavity is used for containing the photosensitive device, the containing cavity extends along the thickness direction of the backlight module, and the projection of the containing cavity in the thickness direction of the backlight module is overlapped with the projection of the second display area in the thickness direction of the backlight module;
the first dimming components are circumferentially distributed along the periphery of the accommodating cavity, the first dimming components comprise a plurality of first dimming units and a plurality of second dimming units, the luminous colors of the first dimming units are different from the luminous colors of the second dimming units, the light emitting surface of each first dimming unit is covered with a layer of fluorescent powder, and at least one second dimming unit is arranged between every two adjacent first dimming units;
the backlight module further comprises a second dimming component, the projection of the second dimming component in the thickness direction of the backlight module and the projection of the first display area in the thickness direction of the backlight module are overlapped with each other, and the half-peak width value of the second dimming component is larger than that of the first dimming component.
2. The display module of claim 1, further comprising an encapsulation layer on a light emitting side of the first dimming component, wherein when the number of the first dimming units and the number of the second dimming units are equal, an interval L between two adjacent dimming units, and an interval H between a surface of the first dimming component facing the encapsulation layer and the encapsulation layer, wherein H +=l/tan 75 °.
3. The display module of claim 2, wherein the ideal peak height of the second dimming unit is H1, the actual peak height of the second dimming unit is H2, when the number of the first dimming unit and the number of the second dimming unit are equal, the number of the second dimming units is N, and the actual number of the second dimming units is N, N being greater than or equal to N (H1/H2).
4. The display module of claim 2, wherein the projected area of the second dimming unit on the display panel is S1, and the projected area of the first dimming unit on the display panel is S2, wherein S1/s2=h1/H2.
5. The display module of claim 4, wherein the projection of the second dimming unit in the light emitting direction is rectangular or trapezoidal.
6. The display module assembly of claim 2, wherein the display module assembly comprises,
the projection area of the first green sub-pixel of the first display area in the thickness direction of the display panel is S3, and the projection area of the second green sub-pixel of the second display area in the thickness direction of the display panel is S4, wherein S4/S3> H1/H2.
7. The display module of claim 6, wherein the projection area of the white sub-pixels of the two display areas in the thickness direction of the display panel is S5, wherein S5< S4.
8. The display module of claim 1, wherein the first dimming unit is a blue light emitting chip, the phosphor covered on the blue light emitting chip is red, and the second dimming unit is a green light emitting chip.
9. The display module of claim 1, wherein the first dimming unit is a blue light emitting chip, the phosphor covered on the blue light emitting chip is green, and the second dimming unit is a red light emitting chip.
10. A driving method of a display device for driving the display module according to any one of claims 1 to 9, the driving method comprising:
controlling the first dimming component and the second display area to emit light under the condition that the photosensitive device is not started;
and under the condition that the opening of the photosensitive device is detected, controlling the first dimming component and the second display area to emit no light.
11. A display device comprising a light sensing device and the display module of any one of claims 1 to 9, the light sensing device being located in an area of the display module where the first dimming component is formed around.
12. The display device according to claim 11, wherein the photosensitive device is a camera.
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