CN116312285A - Display module - Google Patents
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- CN116312285A CN116312285A CN202310143269.4A CN202310143269A CN116312285A CN 116312285 A CN116312285 A CN 116312285A CN 202310143269 A CN202310143269 A CN 202310143269A CN 116312285 A CN116312285 A CN 116312285A
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- light
- area
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- backlight
- guide plate
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 239000011889 copper foil Substances 0.000 claims description 7
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- 230000005465 channeling Effects 0.000 abstract description 5
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/04—Signs, boards or panels, illuminated from behind the insignia
- G09F13/0418—Constructional details
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a display module, which belongs to the technical field of display touch, and comprises the following steps: the display membrane and the backlight module are arranged in a stacked mode; the display membrane is arranged on the surface of the display module and at least comprises a first display area and a second display area, and the first display area and the second display area are connected or overlapped together without gaps; the backlight module comprises a first backlight area, a second backlight area and a separator, wherein the first backlight area is connected with or overlapped with the second backlight area, the first backlight area and the second backlight area are respectively arranged below the first display area and the second display area, and the separator is arranged below the space between the first backlight area and the second backlight area; when only the first backlight area emits light, the quantity of the channeling light rays transmitted to the area which is beyond the first backlight area and is intersected with the second backlight area is smaller than a preset proportion of the total quantity of the transmission light rays of the first backlight area, so that almost no channeling light is transmitted between the first backlight area and the second backlight area.
Description
Technical Field
The invention belongs to the technical field of display touch, and particularly relates to a display module.
Background
At present, most of light-emitting diode display interfaces are directly backlit by light-emitting diodes, and the specific structure of the light-emitting diode display interfaces is as follows: a layer of surface paste comprising at least two icons is arranged on the display module, and an opaque plastic shading bracket is arranged behind the surface paste, and is hollowed out under the position of each icon; in order to prevent light interference between the two icons, a separation layer is arranged below the position between the two icons, and the thickness of the separation layer is between 0.6mm and 2 mm; the lower part of the bracket is provided with a circuit board, and a light source consisting of n lamps is arranged on the circuit board in the position area of the icon.
The display interface of the individual light-emitting diode is backlit by a light guide plate, and the specific structure of the display interface is as follows: a layer of surface paste comprising at least two icons is arranged on the display module, a lightproof plastic shading bracket is arranged below the surface paste, and the bracket is hollowed out under the position of each icon; in order to prevent light interference between the two icons, a separation layer is arranged below the position between the two icons, and the thickness of the separation layer is between 0.6mm and 2 mm; the hollow area below each icon is provided with a uniform light guide plate, the light guide plate is provided with a light input port, the support and the light guide plate inside the hollow space are provided with circuit boards below, and the circuit boards are provided with light sources consisting of n lamps, which correspond to the light input ports of each light guide plate respectively.
The interlayer on the shading bracket in the display module can enable thick black lines of 0.6mm-2mm to be arranged between the icons on the corresponding surface patches; the black line has little influence on the conventional interactive interface of ordinary icons, numbers and fonts; but for the segmented lamplight and the color screen, the black lines affect the beauty. Particularly for color screen display, the existence of black lines severely limits the freedom of design, and the simulated color screen also loses some reality.
Disclosure of Invention
The embodiment of the invention aims to provide a display module, which can solve the technical problems that in the prior art, black lines exist between icons on corresponding surface patches of a light-emitting diode display interface due to an interlayer on a shading support, the black lines can influence the appearance, the design freedom is severely limited, and the display fidelity of the display module is reduced. In order to solve the technical problems, the invention provides a display module.
The embodiment of the invention provides a display module, which comprises: the display membrane and the backlight module are arranged in a stacked mode;
the display membrane is arranged on the surface of the display module and at least comprises a first display area and a second display area, the first display area and the second display area are connected or overlapped together without gaps, the first display area is used for displaying first content, and the second display area is used for displaying second content;
The backlight module comprises at least a first backlight area, a second backlight area and a separator, wherein the first backlight area is connected with or overlapped with the second backlight area, the first backlight area is arranged below the first display area, the second backlight area is arranged below the second display area, and light rays emitted by each backlight area are upward and can completely cover the corresponding display area; the spacer is arranged below the first backlight area and the second backlight area; when only the first backlight region emits light, the quantity of the channeling light rays propagating to the region outside the first backlight region and crossing the second backlight region is less than a preset proportion of the total quantity of the propagating light rays of the first backlight region, so as to ensure that almost no channeling light exists between the first backlight region and the second backlight region.
Thus, when the two backlight areas of the backlight module emit light; the light emitted by the light-emitting backlight area reaches the display area of the whole corresponding display membrane upwards, so that the display content of the display area is changed into light emission. Finally, two non-interval luminous display areas are formed on the surface of the display module.
When one backlight area of the backlight module emits light, the other backlight areas do not emit light; the light emitted by the light-emitting backlight area reaches the display area of the corresponding display membrane upwards, so that the display content of the display area is changed into light emission. In addition, the number of blowby light rays propagating from the light-emitting backlight area to other backlight areas connected together is very limited and negligible. Finally, on the surface of the display module, the display content in the display area corresponding to the light-emitting backlight area becomes light-emitting, and other display areas connected together have almost no brightness change.
Further, the backlight module comprises a shading component and a positive luminous light source;
the shading component is arranged above the positive luminous light source and below the display membrane;
the positive light-emitting light source comprises a circuit board, a first front light-emitting diode and a second front light-emitting diode; the first front light emitting diode and the second front light emitting diode at least comprise a group of front light emitting diodes;
the light shielding component is a plastic shell and comprises a light shielding frame body and at least one isolating piece arranged in the light shielding frame body, the isolating piece is a light shielding wall, the thickness of the high part of the light shielding wall gradually becomes thinner, the position contacting the display membrane almost becomes a thin line with the width smaller than 0.2mm, a tip angle is formed, the light shielding wall separates a first backlight area and a second backlight area, a first front light emitting diode is arranged in the first backlight area, and a second front light emitting diode is arranged in the second backlight area.
In this way, the backlight module is arranged below the display areas in the display membrane, and each backlight area can completely illuminate the corresponding display area and does not blow out to other display areas.
Further, the transmittance of the two display regions except for the junction is 80%, and the transmittance of the region with the width of 0.2mm at the junction is 100%; the transition between 80% and 100% light transmittance may be gradual.
Further, the height of the light-blocking wall is slightly lower than that of the light-blocking frame body, the thickness of the light-blocking wall in the height direction is gradually narrowed, and the width of the highest position is between 0.2mm and 0.6 mm.
Thus, the precision requirement of the shading component can be low, and the production of the shading component is more convenient.
Further, the backlight module comprises another light guide plate assembly, another shading assembly and a positive light-emitting light source, wherein the positive light-emitting light source comprises a circuit board and at least two groups of positive light-emitting diodes. The light guide plate assembly comprises two light guide plates, wherein a chamfer is arranged below the joint of the two light guide plates, and the two chamfers are together formed into a reverse V shape. The shading component is a plastic shell and comprises a shading frame body, a step and at least one light-isolating wall; the height of the step and the light-isolating wall is equal to the height of the shading frame body minus the thickness of the light guide plate component. The thickness of the light-isolating wall in the height direction gradually tapers, and the highest part is a thin line to form a tip angle. Just matching with two chamfers on the light guide plate component; the light guide plate assembly is disposed on the step and the partition wall. The light shielding component is arranged above the positive light emitting source, and the light shielding wall is arranged in the light shielding frame body to divide the light shielding frame body into at least two backlight areas, and each backlight area is provided with at least one group of positive light emitting diodes.
In this way, the backlight module is arranged below the display areas of the display membrane, and each backlight area can completely illuminate the corresponding display area and does not blow out light to other display areas.
Further, the backlight module comprises a shading component and a light guide plate component;
the light guide plate assembly comprises a first light guide plate and a second light guide plate which are connected with each other, and the joint of the first light guide plate and the second light guide plate is not chamfered;
the shading component is arranged above the positive luminous light source and below the display membrane;
the light shielding component comprises a light shielding frame body with hollowed left and right ends and three light isolation walls, the light shielding frame body is provided with steps, the light guide plate component is arranged on the steps and the three light isolation walls, and the surface of the light guide plate component is level with the surface of the light shielding frame body; the thickness of the light-isolating wall is gradually thinned in the height direction, the three light-isolating walls are respectively arranged at two ends and the inside of the light-shielding frame body, the three light-isolating walls are divided into a first backlight area and a second backlight area, the light-shielding component is arranged above the positive light-emitting light source, a first front light-emitting diode is arranged in the first backlight area, and a second front light-emitting diode is arranged in the second backlight area.
Thus, the backlight module is arranged below the display area in the display membrane, and the left end and the right end of the backlight module are completely covered by the display membrane; therefore, one display module can provide a luminous color picture without gaps and frames at the left end and the right end; a plurality of display modules can be combined together in a left-right connection mode to extend gapless display content, and the display modules can be used for modularly designing the gapless display. Meanwhile, the structure of the light guide plate and the shading component is relatively simpler, and the assembly is more convenient.
Further, the backlight module comprises a light guide plate, a reflector and a side-emitting light source;
the side light source comprises a circuit board, a first side light emitting diode and a second side light emitting diode; the first side light emitting diode and the second side light emitting diode each comprise at least one group of side light emitting diodes.
The light guide plate comprises a transparent substrate, a separator, a first refraction area, a second refraction area, a first input port and a second input port, wherein the separator is a dividing line;
the dividing line is a half-penetrating or full-penetrating gap on the transparent substrate, and separates a first refraction area and a second refraction area to form a first backlight area and a second backlight area; the width of the parting line is smaller than 1mm, the depth of the parting line is larger than one fourth of the thickness of the transparent substrate, the length of the parting line is larger than the lengths of the first refraction area and the second refraction area, and an included angle formed by the straight line from the top end of the parting line to the light emitting diode and the straight line perpendicular to the plane of the light emitting diode is larger than 60 degrees.
The light guide plate is arranged above the reflector and the side-emitting light source and below the display membrane;
the size of the first refraction area is smaller than or equal to the size of the first display area, and the size of the second refraction area is smaller than or equal to the size of the second display area;
The first side light emitting diode is arranged in the first input port and corresponds to the first refraction area; the second side light emitting diode is arranged in the second input port and corresponds to the second refraction area;
the reflector covers the first refractive region and the second refractive region.
In this way, light emitted from the light emitting diode corresponding to one backlight area can rarely propagate into the backlight area not corresponding to the light emitting diode. The backlight module forms two backlight areas which do not cross light. In this way, the backlight module is arranged below the display areas in the display membrane, and each backlight area can completely illuminate the corresponding display area and does not blow out to other display areas.
Further, at least one light-isolating film is arranged in the gap of the transparent substrate on the light guide plate penetrated by the dividing line. The light-isolating film is an ultrathin film with low light transmittance, and can be stuck on one surface of the gap through glue or clamped in the middle of the gap through a structure.
Further, the dividing line is a groove which does not completely penetrate through the thickness of the transparent substrate, and separates the two refraction areas to form two backlight areas; the width of the parting line is smaller than 1mm, and the depth is larger than 1/4 of the thickness of the transparent substrate; the length of the dividing line exceeds the length of the refractive region requiring separation. Meanwhile, an included angle formed by a straight line from the top end of the parting line to the light emitting diode and a straight line perpendicular to the plane of the light emitting diode is larger than 60 degrees.
Further, the display membrane at least comprises a first display area and a second display area which are connected without gaps, the first display area comprises a first display sub area and a second display sub area, the light transmittance of the first display sub area is different from that of the second display sub area, the second display area comprises a third display sub area and a fourth display sub area, and the light transmittance of the third display sub area and the light transmittance of the fourth display sub area are different. The backlight module comprises at least a first backlight area and a second backlight area, wherein the first backlight area comprises a first backlight subarea and a second backlight subarea, the brightness of the first backlight subarea is different from that of the second backlight subarea, the second backlight area comprises a third backlight subarea and a fourth backlight subarea, and the brightness of the third backlight subarea is different from that of the fourth backlight subarea; the first display area and the second display area correspond to the first backlight area and the second backlight area respectively; the first display subarea, the second display subarea, the third display subarea and the fourth display subarea correspond to a first backlight subarea, a second backlight subarea, a third backlight subarea and a fourth backlight subarea respectively. The brightness of a backlight sub-region is proportional to the light transmittance of the corresponding display sub-region. Thus, the contrast of the display content of the display module can be obviously improved by adjusting the local brightness of the backlight area.
Further, the backlight module comprises a first light guide plate, a second light guide plate, a reflector and a side light source;
the side light-emitting light source comprises a circuit board, a first side light-emitting diode and a second side light-emitting diode, and the first side light-emitting diode and the second side light-emitting diode are not in the same plane;
the first light guide plate comprises a first transparent substrate, a first dividing line, a first refraction area and a first input port;
the second light guide plate comprises a second transparent substrate, a second dividing line, a second refraction area and a second input port;
the first dividing line and the second dividing line are gaps arranged on the first transparent substrate and the second transparent substrate respectively, a first refraction area is separated through the first dividing line, a second refraction area is separated through the second dividing line, the widths of the first dividing line and the second dividing line are smaller than 1mm, the depths of the first dividing line and the second dividing line are larger than one fourth of the thicknesses of the first transparent substrate and the second transparent substrate, the length of the first dividing line is larger than the length of the first refraction area, and an included angle formed by a straight line from the top end of the first dividing line to the first side light emitting diode and a straight line perpendicular to the plane of the first side light emitting diode is larger than 60 degrees; the length of the second parting line is greater than that of the second refraction area, and an included angle formed by a straight line from the top end of the second parting line to the second side light emitting diode and a straight line perpendicular to the plane of the second side light emitting diode is greater than 60 degrees.
The first light guide plate and the second light guide plate are overlapped and arranged above the reflector and below the display membrane;
the first refraction area and the second refraction area are not covered with each other, the first refraction area corresponds to a first backlight area of the backlight module, and the second refraction area corresponds to a second backlight area of the backlight module; the first backlight area and the second backlight area of the backlight module are connected together on the same plane.
The reflector covers the first refraction area and the second refraction area;
the first side light emitting diode is arranged in the first input port and corresponds to the first refraction area, and the second side light emitting diode is arranged in the second input port and corresponds to the second refraction area.
Therefore, the backlight module can realize two backlight areas which do not cross light mutually by the implementation method of the upper layer light emitting diode, the lower layer light emitting diode and the light guide plate. The backlight module is arranged below the display areas in the display membrane, and each backlight area can completely illuminate the corresponding display area and does not blow out to other display areas. Meanwhile, the implementation method can solve the problem that a plurality of display areas of the display membrane are relatively narrow.
Further, the backlight module comprises a first light guide plate, a second light guide plate, a reflector and a side light source;
The side light-emitting light source comprises a circuit board, a first side light-emitting diode and a second side light-emitting diode, and the first side light-emitting diode and the second side light-emitting diode are not in the same plane;
the first light guide plate comprises a first transparent substrate, a first dividing line, a first refraction area and a first input port;
the second light guide plate comprises a second transparent substrate, a second dividing line, a second refraction area and a second input port;
the first light guide plate and the second light guide plate are overlapped and arranged above the reflector, the first refraction area is overlapped with the second refraction area, the first refraction area corresponds to the first backlight area of the backlight module, the second refraction area corresponds to the second backlight area of the backlight module, and the first backlight area and the second backlight area of the backlight module are overlapped together.
The reflector covers the first refraction area and the second refraction area;
the first side light emitting diode is arranged in the first input port and corresponds to the first refraction area; the second side light emitting diode is arranged in the second input port and corresponds to the second refraction area.
Therefore, the backlight module can realize two backlight areas without light channeling through the implementation method of the light emitting diodes and the light guide plates of the upper layer and the lower layer. The backlight module is arranged below the display areas in the display membrane, and each backlight area can completely illuminate the corresponding display area and hardly emit light to other display areas. At the same time, the implementation method can solve the problem that two overlapped display areas in the display membrane, such as one display area comprises the other display area.
Further, the backlight module further comprises a shading film, the shading film comprises a shading area and at least one transparent area, the shading film is arranged between the first light guide plate and the second light guide plate which are overlapped up and down, and the transparent area is located above the second refraction area of the second light guide plate. The size of the transparent area is equal to or slightly smaller than the size of the second display area corresponding to the second refraction area of the second light guide plate. The light-blocking areas are low light transmission and high reflection, such as light transmission below 20% and reflectivity above 40%.
Therefore, the boundary sense of the two backlight areas of the backlight module, which hardly emit light, can be clearer, and finally, the quantity of the emitted light rays of the display area is reduced.
Further, the display module comprises a hidden layer, an upper light guide plate and an upper side luminous light source;
the low light transmittance of the hidden layer is lower than 30%; the hidden layer is arranged on the surface of the display module;
the upper side light-emitting source comprises a group of side light-emitting diodes, and the side light-emitting diodes of the upper side light-emitting source are arranged on a circuit board of the side light-emitting source of the backlight module, or the side light-emitting diodes of the upper side light-emitting source are arranged on a circuit board of the side light-emitting source;
the upper light guide plate comprises a transparent substrate, a refractive region with high light transmittance and low refractive index and an input port;
The light guide plate is arranged between the hiding layer and the display membrane;
the side light emitting diode in the upper side light emitting source is arranged at the input port of the upper light guide plate.
Therefore, the display module can provide gapless color display interfaces with different contents by adding the light guide plate which adopts the patterns with high light transmittance and low refractive index as the refractive areas: a background color display interface composed of one or more gapless luminous color pictures, and a color display interface composed of the background color display interface and the patterns on the light guide plate. These highlighted small areas may represent indicator lights or keys.
Further, the display membrane further comprises a hiding layer, wherein the hiding layer is arranged above the display content and on the surface of the display module.
Therefore, the display module is provided with the hidden layer on the display membrane, so that the patterns on the upper light guide plate are not interfered by the light emission of the color membrane behind the upper light guide plate, and the patterns on the upper light guide plate are more uniform and have higher visibility.
Further, the side-emitting light source further comprises a touch sensing disc and a touch chip, a display area corresponding to the touch sensing disc is arranged on the display membrane, and the touch sensing disc is arranged below the display area corresponding to the touch sensing disc; the touch sensing disc is formed by a conductive medium, such as copper foil on a circuit board, and is electrically connected with the touch chip through the circuit board.
Thus, a chip with a touch function and a copper foil on the circuit board are arranged on the circuit board of the light source of the display module to arrange a touch sensing disc, so that the touch interaction function of the display module can be given. The touch display module scheme is efficient and cost-effective.
Further, the display module further comprises a touch membrane, a touch chip and an FPC connector;
the touch membrane comprises a transparent area, a touch sensing area and an FPC connecting terminal, the touch membrane is arranged below the hidden layer, a display area corresponding to the touch sensing area is arranged on the display membrane, and the touch sensing area is arranged below the display area corresponding to the touch sensing area;
the touch chip and the FPC connector are arranged on a circuit board of a light source in the backlight module;
the FPC connection terminal is inserted into the FPC connector.
The touch sensitive area is formed by a conductive medium such as PEDOT or ITO or nano-silver wire.
Therefore, a chip with a touch function is arranged on the circuit board of one of the light sources in one display module, and meanwhile, a touch membrane is added, so that the touch function of one display module can be given. This is another efficient and cost-effective touch display module solution.
The embodiment of the invention has at least the following beneficial technical effects:
in an embodiment of the invention, the display module comprises a display membrane and a backlight module. The display membrane is arranged on the surface of the display module and at least comprises a first display area and a second display area, and the first display area and the second display area are connected in a gapless manner or overlapped together. The backlight module comprises at least a first backlight area, a second backlight area and a spacer, wherein the first backlight area is connected with or overlapped with the second backlight area, the first backlight area is arranged below the first display area, and the second backlight area is arranged below the second display area; the display device is used for displaying the content of the first display area or the second display area without gaps, and black lines are avoided. The spacer is arranged below the first backlight area and the second backlight area; the spacer is a light-separating wall or a dividing line or a dividing groove, the quantity of the light rays of the fleeing light in the non-luminous display area is limited in a certain range, the attractiveness of the display module is improved, the design freedom is facilitated, and the display fidelity of the display module can be improved.
Drawings
FIG. 1 is an exploded view of a display module according to the present invention;
FIG. 2 is a schematic illustration showing a display module according to the present invention including a display film;
FIG. 3 is a cross-sectional view showing a display module according to the present invention including a light blocking wall, a light shielding frame and a display film;
FIG. 4 is an exploded view of a display module according to another embodiment of the present invention;
fig. 5 is an exploded view of a display module including three light-blocking walls, a light-shielding frame, and two light-guiding plates according to another embodiment of the present invention;
FIG. 6 is an exploded view of a display module according to another embodiment of the present invention;
FIG. 7 is an exploded view of a display module according to another embodiment of the present invention;
fig. 8 is a schematic view showing a display module according to another embodiment of the present invention, including a light guide plate;
fig. 9 is a schematic view showing a display module according to another embodiment of the present invention, including a light guide plate;
fig. 10 is a schematic view showing a display module according to another embodiment of the present invention, including a light guide plate;
FIG. 11 is an exploded view of a display module according to another embodiment of the present invention;
FIG. 12 is an exploded view of a display module according to another embodiment of the present invention;
FIG. 13 is an exploded view of a display module according to another embodiment of the present invention;
Fig. 14 is a schematic view showing a display module according to another embodiment of the present invention, including a light guide plate;
FIG. 15 is an exploded view of a display module according to another embodiment of the present invention;
FIG. 16 is an exploded view of a display module according to another embodiment of the present invention;
FIG. 17 is an exploded view of a display module according to another embodiment of the present invention;
FIG. 18 is a schematic illustration showing a display module according to the present invention including a display film with a hidden layer;
fig. 19 is an exploded view of a display module according to another embodiment of the present invention. The achievement of the object, functional features and advantages of the present invention will be further described with reference to the embodiments, referring to the accompanying drawings.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The display module provided by the embodiment of the invention is described in detail below by means of specific embodiments and application scenes thereof with reference to the accompanying drawings.
The display membrane is arranged on the surface of the display module and at least comprises a first display area and a second display area, the first display area and the second display area are connected or overlapped together without gaps, the first display area is used for displaying first content, and the second display area is used for displaying second content;
the backlight module comprises at least a first backlight area, a second backlight area and a spacer, wherein the first backlight area is connected with or overlapped with the second backlight area, the first backlight area is arranged below the first display area, the second backlight area is arranged below the second display area, and the spacer is arranged below the space between the first backlight area and the second backlight area; when only the first backlight region emits light, the amount of the blowby light propagating to the region outside the first backlight region intersecting the second backlight region is less than a preset proportion of the total amount of the propagated light of the first backlight region, so as to ensure that little blowby light is generated between the first backlight region and the second backlight region.
The spacers are partition walls, dividing lines, dividing grooves or dividing grooves.
Alternatively, the preset proportion is 5%, and in the actual use process, a person skilled in the art can determine the magnitude of the preset proportion according to actual needs, which is not limited herein.
Referring to fig. 1, a structural exploded view of a display module provided by the present invention is shown.
The display module includes: the display film 120 and the backlight module include a light shielding component 140 and a positive illumination light source 160.
Optionally, the display film 120 includes at least a first display area 121 and a second display area 122.
Alternatively, the first display region 121 and the second display region 122 have a light transmittance of 80%.
Optionally, the display film 120 further includes a light diffusion layer 125, and the light diffusion layer 125 is formed by applying a light diffusion coating layer on the back surface of the display film 120.
Alternatively, the first display area 121 and the second display area 122 may be spliced together without a gap, or may overlap together without a gap.
Optionally, the forward light source 160 includes a circuit board 169 and a first front light emitting diode 161 and a second front light emitting diode 162.
Optionally, the light shielding component 140 is a plastic housing comprising a light shielding frame 144 and a light shielding wall 143; the light blocking wall 143 is disposed below the boundary area of the first display area 121 and the second display area 122 and above the positive emission light source 160.
Alternatively, the thickness of the light barrier 143 is tapered to a height such that the position contacting the display membrane becomes almost a thin line having a width of less than 0.2mm, forming a tip angle. Thus, the space in the light shielding frame 144 is separated into two hollowed-out areas 141 and 142, and two groups of light emitting diodes 161 and 162 corresponding to each other form a first backlight area and a second backlight area on the surface of the backlight module.
Alternatively, the first backlight area and the second backlight area may be spliced together without a gap, or may overlap together without a gap, and the first backlight area and the second backlight area correspond to the first display area 121 and the second display area 122, respectively.
Alternatively, the light barrier wall 143 may be an unsealed wall or a closed enclosure wall.
Alternatively, the thickness of the light blocking wall 143 becomes gradually thinner in the height direction until the position contacting the display film 120 becomes a thin line having a width of only 0.2mm, forming a tip angle.
Optionally, the first front side light emitting diode 161 and the second front side light emitting diode 162 are each composed of a set of nine blue front side light emitting diodes.
In practical applications, when the two sets of leds 161 and 162 are turned on, the light source emits blue light. The light propagates in the two hollow areas 141 and 142 in the light shielding frame 144, and most of the light is directly emitted to the corresponding display area on the display film 120, and some of the light propagates to the inner wall of the hollow area for emission and then propagates to the display film 120. When the blue light enters the diffusion layer of the display film 120, it is dispersed in several directions. Therefore, although no light is directly incident into the display film 120 at the tip angle of the light-blocking wall 143 in the light-blocking frame 144, the light incident into the display film 120 at the periphery is scattered by the light scattering to a part of the light with a width smaller than 0.2 mm. Finally, the light passes through the first display area 121 and the second display area 122 on the display membrane 120, and forms two relatively uniform blue non-interval display areas on the surface of the display module, and the display brightness of the joint of the two display areas is weaker than that of the other display areas by 0.2 mm.
When one group of light emitting diodes 161 is turned on, the other group of light emitting diodes 162 is turned off, blue light emitted from the light source propagates in the first backlight area 141 in the light shielding frame 144, most of the light is directly emitted to the corresponding first display area 121 on the display membrane, and part of the light propagates to the inner wall of the hollowed-out area for emission and then propagates to the display membrane. When blue light enters the light-diffusing layer of the display film for diffusing and propagating, most of the light passes through the first display area 121. At the same time, a very small portion of the light will also propagate to the second backlight area 142 through the thin wall at the corner of the tip on the diaphragm or through the small gap between the diaphragm and the display film, which is negligible due to its very limited number. Finally, a relatively uniformly luminous blue first display area 121 and a non-luminous second display area 122 are formed on the surface of the display module.
Thus, when one group of light emitting diodes of the luminous light source is connected, the surface of the display module only displays the display area corresponding to the light emitting diodes, and other display areas are not bright; but two groups of light emitting diodes of the luminous light source are connected, and the surface of the display module displays two display areas connected together without gaps.
Referring to fig. 2, a further display module provided by the present invention includes a further display membrane.
In one possible embodiment, the first display area 123 and the second display area 124 have a light transmittance of 80% except at the intersection, and a light transmittance of a 0.2mm wide area at the intersection 126 is 100%. Alternatively, 80% and 100% transitions may be selected as gradual transitions.
In practical applications, when the two sets of leds 161 and 162 are turned on, the light source emits blue light. Light propagates in the first backlight region and the second backlight region in the light shielding frame 144, and the light reaching the junction 126 on the display film 120 is less than the light reaching the first display region 123 and the second display region 124 due to the arrangement of the corner lines of the light shielding wall, so that the display brightness at the junction is weak, and the light transmittance of the display region is corrected. Finally, two relatively uniform blue non-interval display areas are formed on the surface of the display module.
Referring to fig. 3, a structural cross-sectional view of a display module according to the present invention includes a light blocking wall, a light shielding frame, and a display membrane.
In one possible embodiment, the height of the light blocking wall 145 is smaller than the height of the light blocking frame 144, the distance from the display membrane 120 is 0.4mm, the light blocking wall 145 becomes thinner gradually in the height direction, and the width of the highest portion of the light blocking wall 145 is 0.5mm when the distance from the display membrane 120 is 0.4 mm.
In practical applications, when the two sets of leds 161 and 162 are turned on, the light source emits blue light. Light propagates from the first backlight area 141 and the second backlight area 142 in the light shielding frame 144, because the light shielding wall 145 has a gap of 0.4mm to the display film 120, a small portion of the light can directly propagate to the junction on the display film 120, and finally two relatively uniform blue non-interval display areas are formed on the surface of the display module.
When one group of light emitting diodes 161 is turned on, the other group of light emitting diodes 162 is turned off, blue light emitted from the light source propagates in the first backlight area 141 and the second backlight area 142 in the light shielding frame 144, and a small portion of the light can directly propagate to the junction on the display film 120 through a gap of 0.4mm between the light shielding wall 145 and the display film 120, and a very small portion of the light can also propagate to the hollowed-out area 142 due to the very limited number. Finally, a uniformly luminous blue first display area 121 and a non-luminous second display area 122 are formed on the surface of the display module.
Referring to fig. 4, there is shown an exploded view of a structure of another display module provided by the present invention.
The display module provided by the embodiment of the invention comprises: the hidden layer 110, the display membrane 127 and the backlight module comprise a light guide plate assembly 130, a shading assembly 150 and a positive light source 160.
The color of the hidden layer 110 is black, the light transmittance is about 13%, and the hidden layer 110 is disposed on the surface of the display module.
The display membrane 127 comprises display areas 128 and 129 connected without gaps, each display area comprising a color picture. The display membrane 127 is positioned below the hidden layer 110.
The front light 160 includes a wiring board 169 and at least two sets of nine white front light emitting diodes 163 and 164, respectively.
The light guide plate assembly 130 includes a first light guide plate 131 and a second light guide plate 132, wherein the first light guide plate 131 and the second light guide plate 132 have a chamfer below the junction, and the two chamfers are formed into a shape of "≡", and the first light guide plate 131 and the second light guide plate 132 each use a transparent plate with a thickness of 1mm as a base material.
The light shielding assembly 150 is a plastic housing, and the light shielding assembly 150 includes a light shielding frame 154, a step 155, and a light shielding wall 159; the height of the step 155 is 1mm lower than the height of the light shielding frame 154. The light blocking wall 159 partitions the space within the light blocking frame 154 into the first backlight area 151 and the second backlight area 152. The light blocking wall 159 is disposed under the boundary region of the first display region 128 and the second display region 129; the thickness of the light barrier 159 begins to taper in the height direction of the step 155 to a thin line with a width less than 0.2mm from the display film sheet 0.4mm, forming a sharp corner, which fits exactly with the two chamfers on the light guide plate assembly 130; the light guide plate assembly 130 is disposed on the step 155 and the light blocking wall 159, and the forward light source 160 is disposed under the light blocking assembly 150 to form a backlight module disposed under the display film 127.
In the practical application process, when the two sets of leds 163 and 164 are turned off and the light source does not emit light, the ambient light irradiates the surface of the display module, 13% of the light passing through the hidden layer 110 is reflected by different areas of the display film, the light guide plate and the circuit board after passing through the hidden layer 110, and then less than 1% of the light passing through the hidden layer 110, so that the different areas of the light shielding film, the light guide plate and the reflector after the hidden layer are hardly visible. Under ambient light, only one black surface of the display module is visible.
When the two sets of light emitting diodes 163 and 164 are turned on, the light source emits white light. Light propagates from the first and second backlight regions 151 and 152 in the light shielding frame 154, most of the light is directly incident from the lower surfaces of the first and second light guide plates 131 and 132 and then emitted from the upper surfaces to the display film, and a small portion of the light propagates inside the light guide plates 131 and 132 and then emitted from the upper surfaces to the display film. Finally, the light forms two gapless luminous color pictures through the first display area 128 and the second display area 129 of the color pictures on the surface of the display module.
When one group of the light emitting diodes 163 is turned on, the other group of the light emitting diodes 164 is turned off, white light emitted from the light source propagates in the first backlight area 151 in the light shielding frame 144, most of the light is incident from the lower surface of the light guide plate 131 and then directly emitted to the display film from the upper surface, and a small part of the light propagates inside the light guide plate 131 and then is emitted to the color picture of the display area 128 from the upper surface of the light guide plate. A small portion of the light is emitted from the edge of the junction of the light guide plate 131, and less light is emitted from the edge of the junction into the light guide plate 132 and then emitted upward from the light guide plate to the display film 127. The number of these rays is very small and negligible. Finally, all the light passes through the color picture, and a luminous color picture and a black surface are respectively formed in the first display area 128 and the second display area 129 on the surface of the display module.
Referring to fig. 5, there is shown a structural exploded view of another display module provided by the present invention including three light-blocking walls, a light-shielding frame, and two light-guiding plates.
In one possible embodiment, the display module includes a light guide plate assembly 135 and a light shielding assembly 170, the light guide plate assembly 135 includes a first light guide plate 133 and a second light guide plate 134, the two light guide plates have no chamfer under the junction, and the light guide plates are made of transparent plates with a thickness of 1mm as a base material.
The light shielding assembly 170 is a plastic housing, and the light shielding assembly 170 includes a light shielding frame 174, two steps 175 and 176, and three light blocking walls 177, 178 and 179; the height of the steps 175 and 176 is 1mm lower than the height of the light shielding frame 174. The heights of the light blocking walls 177, 178 and 179 are 1mm lower than the height of the light blocking frame 174. The light blocking walls 177, 178 and 179 are disposed on both sides of the first display region 128 and the second display region 129 and under the boundary region, respectively, to form a first backlight region 171 and a second backlight region 172; the thickness of the light barrier walls 177, 178 and 179 tapers from high to a thin line with a width of less than 0.4mm at the highest point, forming a tip angle. The light guide plate assembly 135 is placed on the steps 175 and 176 and the light blocking walls 177, 178 and 179.
In the practical application process, when one group of the light emitting diodes 163 is turned on and the other group of the light emitting diodes 164 is turned off, white light emitted from the light source propagates in the first backlight area 171 in the light shielding frame 174, and most of the light is emitted from the lower surface of the light guide plate 133 and then directly emitted from the upper surface to the display film 127, so that the color picture on the first display area 128 becomes light. The pointed corners of the light barrier walls 177 and 179 have their top ends fully illuminated by the color image on the first display area 128, and the left edge of the illuminated image is the edge of the display module. Finally, all the light passes through the color picture, and a left frame-free luminous color picture and a black surface are respectively formed in the first display area 128 and the second display area 129 on the surface of the display module.
Thus, one display module can provide a luminous color picture without gaps and frames at the left end and the right end; a plurality of such display modules are connected together without gaps so that the display contents can be modularly extended. Meanwhile, the structure of the light guide plate and the shading component is relatively simpler, and the assembly is more convenient.
Referring to fig. 6, there is shown an exploded view of a structure of another display module provided by the present invention.
In one possible embodiment, the display module includes a hidden layer 110, a display membrane 180, and a backlight module including a light guide plate 138, a light shielding assembly 190, and a positive illumination light source 165.
The color of the hidden layer 110 is black, and the light transmittance is about 13%; the hidden layer 110 is disposed on the surface of the display module.
The display film 180 includes at least two first display areas 181 and second display areas 182 connected without gaps, each display area including a color picture, and the display film 180 is disposed under the hidden layer 110.
The front light 165 includes a wiring board 168 and at least two pairs of twenty white front light emitting diodes 166 and three white front light emitting diodes 167, respectively.
The light guide plate 138 includes a first light guide region 136 and a second light guide region 137, which may be completely separated, half-separated, or not separated. The term completely separated means that a penetrating slit exists at the junction of the two light guide areas, so that the two light guide areas are completely separated; by semi-split is meant that the junction of the two light guiding areas has an impermeable slit separating a portion of the two light guiding areas and a portion of the two light guiding areas are joined together; by not separating it is meant how the junction of two light guiding areas is handled; here, the two light guiding areas are not separated. The light guide plate uses a transparent plate with the thickness of 1mm as a base material.
It should be noted that, the light shielding assembly 190 is a plastic housing, including a light shielding frame 194, a step 195, and a partition 197; the height of the step 195 is 1mm lower than the height of the light shielding frame 194. The height of the light blocking wall 197 is 1mm lower than the height of the light blocking frame 194. The partition wall 197 is disposed under the boundary area of the two display areas 181 and 182 to form a first backlight area 191 and a second backlight area 192; the thickness of the partition wall 197 becomes thinner gradually in the height direction to become a thin line having a width smaller than 0.4mm at the highest point, forming a tip angle. The light guide plate 138 is disposed on the step 195 and the partition wall 197, and the positive light source 165 is disposed under the light shielding member 190, and the two groups of light emitting diodes 166 and 167 respectively correspond to the first backlight region 191 and the second backlight region 192 to form a backlight module; the backlight module is disposed under the display film 180.
In practical application, when the two sets of leds 166 and 167 are turned off and the light source does not emit light, the ambient light irradiates the surface of the display module, 13% of the light passing through the hidden layer 110 is reflected by different areas of the display film, the light guide plate and the circuit board after passing through the hidden layer 110, and then less than 1% of the light passing through the hidden layer 110, so that the different areas of the light shielding film, the light guide plate and the reflector after the hidden layer are hardly visible. Under ambient light, only one black surface of the display module is visible.
When all the LEDs 166 of one group are turned on and the other group 167 is turned off, white light emitted by the light source enters the hollowed-out area 191 in the shading component 190 to be transmitted, most of the light is directly emitted from the lower surface of the first light guide plate 136 and then emitted to the display membrane from the upper surface, and a small part of the light is transmitted inside the first light guide plate 136 and then emitted to the display membrane from the upper surface of the light guide plate; a very small portion of the light can be transmitted to the second light guide plate 137, and then the light emitted from the upper surface of the light guide plate to the display film sheet is almost negligible. Finally, the light forms a luminous color picture in the first display area 181 and a black surface in the second display area 182 on the surface of the display module through the color picture.
When all the leds of one set of leds 166 remain on and the middle one of the other set of leds 167 is updated to be on, white light having almost similar density is emitted from the light source to enter the first backlight region 191 and the second backlight region 192 in the light shielding assembly 190 to be transmitted, most of the light is directly emitted from the lower surfaces of the first light guide plate 136 and the second light guide plate 137 and then emitted from the upper surfaces to the display film, and a small portion of the light is transmitted inside the light guide plates 136 and 137 and then emitted from the upper surfaces to the display film. Finally, the light beams uniformly form two gapless luminous color pictures in the first display area 181 and the second display area 182 on the surface of the display module through the color pictures.
When all the LEDs of the group of LEDs 166 and one of the LEDs of the other group of LEDs 167 are kept on, the other two LEDs of the group of LEDs 167 are updated and turned on, and the light source emits white light rays with different densities into the hollowed-out areas 191 and 192 in the shading component 190 to be transmitted, wherein the light ray density in the hollowed-out area 192 is about three times that in the hollowed-out area 191; most of the transmitted light is directly incident from the lower side of the light guide plates 136 and 137 and then emitted from the upper side to the display film, and a small portion of the light is transmitted inside the light guide plates 136 and 137 and then emitted from the upper side of the light guide plates to the display film. Finally, the light forms two gapless luminous color pictures with different brightness through the color pictures in the display areas 181 and 182 on the surface of the display module, and the brightness of the display area 182 is almost three times that of the display area 181. Here, we call the color picture in the display area 182 full-bright light, and the color picture in the display area 181 half-bright light.
In this way, the display mode can display a half-bright or full-bright color picture without gaps in the middle area of an overall half-bright color picture.
Alternatively, the above-mentioned light density is the amount of light propagating in one unit area.
Alternatively, the above-mentioned partition walls may have different geometric shapes, such as non-closed walls like straight walls, "S" shaped curved walls, closed enclosing walls like square or circular.
Referring to fig. 7, there is shown an exploded view of a structure of another display module provided by the present invention.
In one possible embodiment, the display module includes a display film 230 and the backlight module includes a light guide plate 240, a reflector 251 and a side light source 260.
The display membrane 230 is disposed on the surface of the display module, the display membrane 230 includes a first display area 231 and a second display area 232, the first display area 231 and the second display area 232 are connected together without gaps, the first display area 231 is used for displaying the first content, and the second display area 232 is used for displaying the second content; each display area comprises a color picture.
The display film 230 further includes a light diffusion layer 235, and the light diffusion layer 235 is applied to the back surface of the display film 230 by a light diffusion coating. The display film 230 is disposed on the surface of the display module.
The backlight module comprises a light guide plate 240, a reflector 251 and a side-emitting light source 260; the side light source 260 includes a wiring board 269, a first side light emitting diode 261, and a second side light emitting diode 262;
Alternatively, the first side light emitting diode 261 and the second side light emitting diode 262 are each composed of a group of one to a plurality of side light emitting diodes.
The light guide plate 240 includes a transparent substrate 241, a dividing line 242, a first refractive region 243, a second refractive region 244, a first input port 245, and a second input port 246; the dividing line 242 is a slit disposed on the transparent substrate 241, the dividing line 242 divides the first refraction area 243 and the second refraction area 244, the width of the dividing line 242 is less than 1mm, the depth of the dividing line 242 is greater than one fourth of the thickness of the transparent substrate 241, the length of the dividing line 242 is greater than the lengths of the first refraction area 243 and the second refraction area 244, and the included angle formed by the straight line from the top end of the dividing line 242 to the side light emitting diode 261 or 262 and the straight line perpendicular to the plane of the light emitting diode is greater than 60 degrees; in this way, light emitted by the light emitting diode is rarely transmitted into the refraction area which is not corresponding to the light emitting diode.
The light guide plate 240 is disposed below the display film 230 and above the reflector 251 and the side light source 260; the size of the first refraction region 243 is smaller than or equal to the size of the first display region 231, and the size of the second refraction region 244 is smaller than or equal to the size of the second display region 232; the first side light emitting diode 261 is disposed in the first input port 245 and corresponds to the first refraction region 243; the second side light emitting diode 262 is disposed in the second input port 246 and corresponds to the second refraction region 244;
The reflector covers the first refractive region 243 and the second refractive region 244;
the surface of the backlight module includes a first backlight area and a second backlight area, which respectively correspond to the first refraction area 243 and the second refraction area 244.
Alternatively, particles of different shapes and different densities may be disposed on top of the transparent substrate 241 by printing as desired within the first and second refractive regions 243, 244.
In the practical application process, when the two groups of light emitting diodes 261 and 262 are turned off and the side light source 260 does not emit light, the ambient light irradiates the surface of the display module, and the picture on the surface of the display module reflects a part of the light, and the quantity of the light depends on the brightness of the ambient light and the emissivity of the picture; when the reflected light reaches a certain quantity, the picture becomes visible;
when one group of light emitting diodes 261 is turned on, the other group of light emitting diodes 262 is turned off, white light is emitted from the side light emitting light source 260 and is emitted into the transparent substrate 241 from the first input port 245 for transmission, most of the light is transmitted to the first refraction area 243 for refraction, so that part of the light is emitted to the first display area 231 from the direction perpendicular to the transparent substrate 241, and the other part of the light is emitted from the back of the transparent substrate 241 and is reflected by the reflector 251 and is emitted to the transparent substrate 241 again from the bottom for transmission to the upper part of the transparent substrate 241 for the second transmission and then is emitted; the emitted light passes through the diffusion layer 235 and the first display region 231 having non-uniform transmittance, so that the color picture on the first display region 231 becomes light-emitting.
Meanwhile, at the edge of the first refraction area 243 near the dividing line 242, a small part of light is transmitted or refracted and then emitted from the transparent substrate 241 to enter the gap of the dividing line 242; some of these light rays will strike the region where the first display region 231 and the second display region 232 meet, and a thin light-emitting line will be added to the region where the first display region 231 and the second display region 232 meet; another portion continues to propagate to the other wall of the dividing line 242 and then re-enters the transparent substrate 241 to reach the second refraction area 244; in addition to these light rays, some of the light rays are incident into the transparent substrate 241 from the first input port 245, and propagate around the dividing line 242 to the second refraction region 244, and after the light rays are refracted by the second refraction region 244, a small part of the light rays are emitted upward from the direction perpendicular to the transparent substrate 241 to reach the second display region 232, and these emitted light rays pass through the light diffusion layer 235 and the second display region 232 with non-uniform transmittance, and the number of these light rays is very limited and negligible, so that the brightness of the color picture above the second display region 232 is unchanged. Finally, on the surface of the display module, a luminescent color picture is formed in the first display area 231 and the dividing line 242, and a non-luminescent color picture is formed in the second display area 232.
When one group of the light emitting diodes 262 is turned on, the other group of the light emitting diodes 261 is turned off, white light is emitted from the side light emitting source 260 and is transmitted into the transparent substrate 241 from the second input port 246, most of the light is transmitted to the second refraction area 244 for refraction, so that part of the light is emitted upwards from the direction perpendicular to the transparent substrate 241 to reach the second display area 232, and the other part of the light is reflected by the reflector 251 and is transmitted again from the bottom to the transparent substrate 241 for second transmission until the light is emitted from the upper side of the transparent substrate 241, and the emitted light passes through the light scattering layer 235 and the second display area 232 with non-single transmittance, so that the color picture on the second display area 232 becomes luminous.
Meanwhile, at the edge of the second refraction area 244 near the dividing line 242, a small part of light is transmitted or refracted and then emitted from the transparent substrate 241 to enter the gap of the dividing line 242; some of these light rays will strike the region where the first display region 231 and the second display region 232 meet, and a thin light-emitting line will be added to the region where the first display region 231 and the second display region 232 meet; another portion continues to propagate to the other wall of the dividing line 242 and then re-enters the transparent substrate 241 to reach the refraction area 243; in addition to these rays, some of the rays are directed into the transparent substrate 241 from the second input port 246, and propagate around the dividing line 242 to the first refractive region 243; after the light rays are refracted by the first refraction area 243, a small part of the light rays are emitted upwards from the direction perpendicular to the transparent substrate 241 to reach the first display area 231; these emitted light rays pass through the light diffusion layer 235 and the first display region 231 having non-uniform transmittance, and the number of these light rays is very limited to be negligible, and the brightness of the color picture on the first display region 231 is not changed. Finally, a luminous color picture is formed on the surface of the display module in the second display area 232 and the area of the dividing line 242, and a non-luminous color picture is formed on the first display area 231.
When the two light emitting diodes 261 and 262 are turned on, the side light emitting source 260 emits white light, and the white light is emitted into the transparent substrate 241 from the first input port 245 and the second input port 246 for propagation, most of the light is transmitted to the first refraction area 243 and the second refraction area 244 for refraction, so that a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 241 to come into the first display area 231 and the second display area 232, and the other part of the light is emitted from the back of the transparent substrate 241, reflected by the reflector 251, and then is re-emitted into the transparent substrate 241 from the bottom for propagation until reaching the upper part of the transparent substrate 241; the emitted light passes through the diffusion layer 235 and the first and second display regions 231 and 232 of non-uniform transmittance, so that the color picture on the first and second display regions 231 and 232 becomes luminous.
Meanwhile, at the edges of the first refraction area 243 and the second refraction area 244 near the dividing line 242, a small part of light is transmitted or refracted and then emitted from the transparent substrate 241 to enter the gap of the dividing line 242; some of these light rays will strike the region where the first display region 231 and the second display region 232 meet, and these light rays will come from the two refractive regions, so the number will be two times as large as usual, and a luminescent thin line brighter than the other region will be added to the region where the first display region 231 and the second display region 232 meet; finally, a luminescent color picture is formed on the surface of the display module in the first display area 231 and a luminescent color picture is formed on the second display area 232, and at the same time, a brighter thin line is formed at the junction of the two pictures.
Thus, when one of the light emitting diodes of the light emitting source is connected, the surface of the display module only displays the display area corresponding to the light emitting diode, and other display areas are not bright; but two light emitting diodes of the light emitting source are connected, and the surface of the display module displays the first display area 231 and the second display area 232 without gaps; a brighter thin line may be present at the intersection of the first display region 231 and the second display region 232.
Referring to fig. 8, another display module provided by the present invention includes another light guide plate.
In one possible embodiment, the light guide plate 240 includes a transparent substrate 241, dividing grooves 250; the dividing groove 250 is a groove that opens from the bottom of the transparent base material 241 while not penetrating the thickness of the transparent base material 241, partially separating the two first refraction areas 243 and the second refraction areas 244 that are connected together; the depth of the dividing groove 250 needs to be greater than 1/2, here 2/3, of the thickness of the transparent base material 241. The length of the dividing groove 250 exceeds the length of the refractive region requiring separation. Meanwhile, an included angle formed by a straight line from the top end of the dividing groove 250 to the light emitting diode and a straight line perpendicular to the plane of the light emitting diode is greater than 60 degrees, so that light emitted by the light emitting diode can be rarely transmitted into a refraction area which is not corresponding to the light emitting diode.
When one group of the light emitting diodes 261 is turned on, the other group of the light emitting diodes 262 is turned off, the side light source 260 emits white light, the white light is transmitted from the first input port 245 into the transparent substrate 241, is refracted in the first refraction area 243, and directly or indirectly, a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 241 to the first display area 231, so that the color picture on the first display area 231 becomes luminous.
Meanwhile, at the position where the first refraction area 243 is close to the edge of the dividing groove 250, a small part of light is directly transmitted from the upper surface of the dividing groove 250 to the second refraction area 244, and another small part of light is transmitted or refracted, and then is emitted from the transparent base 241 to enter the gap of the dividing groove 250, and a part of the light is transmitted, refracted and reflected in the area where the first display area 231 and the second display area 232 meet, so that a luminescent thin line is added to the area where the first display area 231 and the second display area 232 meet; another portion continues to enter the transparent substrate 241 again to reach the second refraction area 244 after propagating to another wall of the dividing groove 250; in addition to these rays, a portion of the rays are incident into the transparent substrate 241 from the first input port 245 and propagate around the dividing groove 250 to the second refractive region 244; after the light rays are refracted by the second refraction area 244, a small part of the light rays are emitted upwards from the direction perpendicular to the transparent substrate 241 to reach the second display area 232; these emitted light rays pass through the diffusion layer 235 and the second display region 232 having non-uniform transmittance, and the number of these light rays is very limited to be negligible, and the brightness of the color picture on the second display region 232 is hardly changed. Finally, a luminous color picture is formed on the surface of the display module in the first display area 231 and the dividing groove 250, and a non-luminous color picture is formed on the second display area 232.
Thus, the light guide plate adopts the dividing groove, and the brightness of the non-luminous picture is slightly higher than that of the dividing line, but the brightness of the luminous thin line between the luminous picture and the non-luminous picture is slightly lower. Therefore, the display module has more choices.
Referring to fig. 9, another display module provided by the present invention includes another light guide plate.
In one possible embodiment, the light guide plate 240 includes a 2mm thick transparent substrate 241, partition walls 249, two first refraction areas 243, a second refraction area 244, two first input ports 245, and a second input port 246; the light guide plate 240 is disposed below the display film 230 and above the reflector 251 and the side emission light source 260, and the refractive regions 243 and 244 have the same size as the display regions 231 and 232, respectively; the positions of the refraction areas 243 and 244 are the same as the positions of the display areas 231 and 232, respectively; the light emitting diodes 261 and 262 are inserted just inside the first and second input ports 245 and 246, respectively, corresponding to the first and second refraction regions 243 and 244, respectively; the reflector 251 covers the entire first and second refractive regions 243 and 244. The dividing wall 249 separates the first refractive region 243 and the second refractive region 244 connected together with the slit; at least one light blocking film is provided in the slit, and the length of the dividing wall 249 exceeds the length of the refractive region to be separated, which in this embodiment is equal to the width of the transparent substrate 241. The light-blocking film of the dividing wall 249 is an ultrathin film with almost zero light transmittance, and can be stuck on one surface of the slit by glue or clamped in the middle of the slit by a structure. In this way, light hardly continues to propagate through the dividing wall on the other side. In the present embodiment, the light blocking film of the partition wall 249 is adhered to one side of the first refraction region 243.
It will be appreciated that when one set of leds 261 is turned on and the other set of leds 262 is turned off, the side-emitting light source 260 emits white light, and the white light propagates through the first input port 245 into the transparent substrate 241, and most of the light propagates to the first refraction area 243 for refraction, and almost none of the light propagates to the second refraction area 244 for refraction. Finally, a luminous color picture is formed on the surface of the display module in the first display area 231 and a non-luminous color picture is formed in the second display area 232.
Referring to fig. 10, another display module provided by the present invention includes another light guide plate.
In one possible embodiment, the light guide plate 240 includes a 2mm thick transparent substrate 241, a dividing line 242, a first refractive region 247, a second refractive region 248, and first and second input ports 245 and 246; the light guide plate 240 is disposed below the display film 230 and above the reflector 251 and the side emission light source 260, and the first and second refraction regions 247 and 248 are respectively positioned at the same positions as the first and second display regions 231 and 232; the first and second refractive regions 247, 248 have dimensions that are smaller than the dimensions of the first and second display regions 231, 232, respectively; for example, the widths of the first and second refractive regions 247, 248 are about 4mm smaller than the sizes of the first and second display regions 231, 232, respectively, near the light emitting diode entrance, and the widths of the first and second refractive regions 247, 248 are about 2mm smaller than the sizes of the first and second display regions 231, 232, respectively, near the light emitting diode entrance.
Thus, when one group of light emitting diodes 261 is turned on, the other group of light emitting diodes 262 is turned off, white light is emitted from the side light emitting source 260 and is transmitted from the first input port 245 into the transparent substrate 241, most of the light is transmitted to the first refraction area 247 for refraction, so that part of the light is emitted upwards from the direction perpendicular to the transparent substrate 241 to reach the first display area 231, and the other part of the light is emitted from the back of the transparent substrate 241, is reflected by the reflector 251, is re-transmitted from the bottom into the transparent substrate 241 for second transmission until the light is transmitted above the transparent substrate 241; because the light rays emitted after refraction have a certain refraction angle, the area of the transparent substrate 241 capable of emitting the light rays is larger than the refraction area; furthermore, the light emitted from the upper side of the transparent substrate 241 enters the light diffusion layer 235 to diffuse light and spread, and then the light emitting area is expanded; finally, the light rays can cover the entire first display region 231 with non-uniform transmittance, so that the color picture on the first display region 231 becomes luminous.
Meanwhile, since the edge of the refracting region 247 is spaced apart from the edge of the dividing line 242 by a distance of about 1-2mm, only a very small portion of the light rays can enter the space of the dividing line 242 after being transmitted or refracted out of the transparent substrate 241; some of these light rays strike the region where the first display region 231 and the second display region 232 meet, and a relatively dark thin light-emitting line is added to the region where the first display region 231 and the second display region 232 meet; another portion continues to propagate to the other wall of the dividing line 242 and then re-enters the transparent substrate 241 to reach the second refraction area 248; in addition to these rays, a portion of the rays are incident into the transparent substrate 241 from the first input port 245 and propagate around the dividing line 242 to the second refractive region 248; after the light rays are refracted by the second refraction area 248, a small part of the light rays are emitted upwards from the direction perpendicular to the transparent substrate 241 to reach the second display area 232; these emitted light rays pass through the light diffusion layer 235 and the second display region 232 having non-uniform transmittance, and the number of these light rays is very limited to be negligible, and the brightness of the color picture on the second display region 232 is not changed. Finally, a luminous color picture is formed on the surface of the display module in the first display area 231 and the dividing line 242, and a non-luminous color picture is formed in the second display area 232; .
When the two sets of light emitting diodes 261 and 262 are turned on, the side light source 260 emits white light, and the white light is emitted into the transparent substrate 241 from the first input port 245 and the second input port 246 for propagation, most of the light propagates to the first refraction region 247 and the second refraction region 248 for refraction, so that a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 241 to come into the first display region 231 and the second display region 232, and the other part of the light is emitted from the back of the transparent substrate 241, reflected by the reflector 251, and then re-emitted into the transparent substrate 241 from the bottom for propagation until reaching the upper part of the transparent substrate 241; the emitted light passes through the diffusion layer 235 and the first and second display regions 231 and 232 of non-uniform transmittance, so that the color picture on the first and second display regions 231 and 232 becomes luminous.
Meanwhile, since the edges of the first refraction region 247 and the second refraction region 248 are separated from the two edges of the dividing line 242 by a distance of about 1-2mm, the number of light rays reaching the edge of the dividing line 242 is smaller than that of the refraction region, and the light rays are transmitted or refracted for a plurality of times, and then enter the gap of the dividing line 242 after being emitted from the transparent substrate 241, and then are emitted to the region where the first display region 231 and the second display region 232 meet; as a result, the light is accumulated in the two refraction areas, the final light quantity is close to the light emitted from the upper surface of the other refraction areas, the light-emitting thin line with the same brightness as that of the other areas is added to the area where the first display area 231 and the second display area 232 meet, finally, a light-emitting color picture is formed on the surface of the display module, and a non-light-emitting color picture is formed on the first display area 231 and the second display area 232.
It can be understood that by reducing the size of the refraction area, the overlapping of the light emitted after refraction at the junction of the two display areas is reduced, the problem that brighter thin lines exist at the junction of the two pictures is solved, and the effect of displaying two uniformly luminous color pictures on the surface of the display module is achieved.
Referring to fig. 11, there is shown an exploded view of a structure of still another display module provided by the present invention.
In one possible embodiment, the display module includes a further display membrane 230 and a further light guide plate 240.
The display film 230 includes two first display regions 231 and 232 connected without gaps, the first display region 231 includes a color picture, the color picture includes at least three picture regions 233-235 with different light transmittance, the second display region 232 includes a color picture, the color picture includes at least two picture regions 237-238 with different light transmittance, and the light transmittance of the picture region 233 is highest, such as a highest light transmittance of 100%; the light transmittance of the picture areas 234 and 237 is, for example, a light transmittance maximum value of 50%, and the light transmittance of the picture areas 235 and 238 is lowest, for example, a light transmittance maximum value of 10%; display film 230 further includes a light-diffusing layer 239, light-transmitting rate of light-diffusing layer 239 being about 70%; the light diffusion layer 239 is formed by applying a light diffusion coating to the back surface of the display film 230, and the display film 230 is disposed on the surface of the display module.
The different refractive index areas are achieved by designing the refractive index of the refractive body and the density of the refractive body, wherein the white ink dots are used for refraction, the different refractive indexes are achieved according to the layout of different dot densities, and the white ink applied to the back surface of the transparent substrate 241 according to the layout of the refractive bodies with different densities through a printing process forms the different refractive index areas.
When the two groups of light emitting diodes 261 and 262 are turned on, the side light source 260 emits white light, and the white light is emitted into the transparent substrate 241 from the first input port 245 and the second input port 246 to be transmitted, most of the light is transmitted to the refraction areas 252 and 256 to be refracted, so that a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 241 to reach the first display area 231 and the second display area 232, and the other part of the light is emitted from the back of the transparent substrate 241, is reflected by the reflector 251 and is emitted from the bottom to the transparent substrate 241 again to be transmitted for the second time until the light is emitted above the transparent substrate 241; finally, the quantity of the emitted light in the refraction areas 253, 254, 255, 257, 258 is respectively 100%, 40%, 10% of the highest quantity of the light, and the emitted light passes through the light diffusion layer 239 with the light transmittance of 70% and the first display area 231 and the second display area 232 with the non-single light transmittance, so that the color pictures on the first display area 231 and the second display area 232 become luminous. In particular, the amounts of light emitted from the picture areas 233, 234, 235, 237, 238 having different light transmittance over the first display area 231 and the second display area 232 are respectively 70%, 14%, 0.7%, and the number of light rays of the lowest area having a light transmittance of 10% to the number of light rays of the highest area having a light transmittance of 100% are 1:100, and the number of light rays of the area having a light transmittance of 50% to the number of light rays of the highest area having a light transmittance of 100% are 1:5, respectively, on the luminescent color picture, and these contrast ratios are larger than the contrast ratio of the color picture itself.
It can be appreciated that the contrast of the luminous picture on the display surface is improved or reduced by designing different amounts of light emitted from different regions by adopting the light guide of the non-uniform light emission of the whole region.
Referring to fig. 12, there is shown an exploded view of a structure of still another display module provided by the present invention.
In one possible embodiment, the side-emitting light source 280 includes a circuit board 289, two white side-emitting diodes 281 and 282, two touch- sensitive pads 283 and 284, and a touch light control chip 285.
The side light source 280 is disposed below the display film 230, the light guide plate 240, and the reflector 251, and the touch sensing pads 283 and 284 are respectively located at positions corresponding to the first display area 231 and the second display area 232 on the display film 230, and two display areas with touch key functions are formed on the surface of the display module. Touch sensing pads 283 and 284 are formed of copper foil on a circuit board and are connected to touch light control chip 285 through traces on the circuit board.
When the power-on side light source 280 is turned on, the touch light control chip 285 immediately reads an initial capacitance value of the touch sensing pads 283 and 284, and simultaneously, the touch light control chip 285 turns on the light emitting diodes 281 and 282 by using a PWM signal having a duty ratio of 30%, the light emitting diodes 281 and 282 emit white light, and are emitted into the transparent substrate 241 from the first input port 245 and the second input port 246 to propagate, refract, and reflect, and finally, a portion of the light is emitted upward from the direction perpendicular to the transparent substrate 241 to the first display area 231 and the second display area 232, and the emitted light passes through the light diffusion layer 235 and the first display area 231 and the second display area 232 having a non-uniform transmittance, so that color pictures on the first display area 231 and the second display area 232 become luminous and visible.
When a finger touches the display area 231 on the display film, the touch sensing pad 283 corresponding thereto generates another capacitance value, and the difference between the capacitance value and the initial capacitance value is greater than the set threshold value, the touch light control chip 285 determines that the display area 231 with the touch key function is touched. As designed before, touch light control chip 285 turns on leds 281 and 282; the duty cycle of the PWM signal of the light emitting diode 281 is updated from 30% to 100%; the duty cycle of the PWM signal of the light emitting diode 282 is maintained at 30%; the number of white light emitted from the light emitting diode 281 is 3 times or more than before, and the number of white light emitted from the light emitting diode 282 remains the same. These white light rays are input into the transparent substrate 241 to propagate, refract, and reflect, and finally, a part of the light rays are emitted upward from the transparent substrate 241 in the vertical direction to reach the first display region 231 and the second display region 232; the emitted light passes through the diffusion layer 235 and the first display region 231 and the second display region 232 having non-uniform transmittance, so that the color pictures on the first display region 231 and the second display region 232 become luminous and visible, and the color pictures in the first display region 231 are several times brighter than the color pictures in the first display region 231. Here, we call the color picture in the display area 231 full-bright light emission, and the color picture in the display area 232 half-bright light emission.
It should be noted that, the person skilled in the art may set the threshold according to actual needs, which is not limited herein.
When the finger touches the display area 231 on the display film again, the touch light control chip 285 judges that the display area 231 with the touch key function is touched. According to the previous design, touch light control chip 285 turns on light emitting diodes 281 and 282, the duty ratio of the PWM signal of light emitting diode 281 is updated from 100% to 30%, the duty ratio of the PWM signal of light emitting diode 282 is maintained at 30%, these white light rays are inputted into transparent substrate 241 to be propagated, refracted and reflected, and finally, a part of the light rays are emitted upward from the direction perpendicular to transparent substrate 241 and pass through light diffusion layer 235 and first display region 231 and second display region 232 of non-single transmittance, so that the color picture on first display region 231 and second display region 232 becomes half-bright light emission.
When a finger touches the display area 232 on the display film, the touch sensing pad 283 corresponding thereto generates another capacitance value, wherein the difference between the capacitance value and the initial capacitance value is greater than the set threshold value, and the touch light control chip 285 determines that the display area 232 with the touch key function is touched. According to the previous design, the touch light control chip 285 turns on the light emitting diodes 281 and 282, the duty ratio of the PWM signal of the light emitting diode 282 is updated from 30% to 100%, the duty ratio of the PWM signal of the light emitting diode 281 is maintained at 30%, these white light rays are inputted into the transparent substrate 241 to be propagated, refracted and reflected, finally, a part of the light rays are emitted upward from the direction perpendicular to the transparent substrate 241 to come into the first display region 231 and the second display region 232, and the emitted light rays pass through the light diffusion layer 235 and the first display region 231 and the second display region 232 of non-uniform transmittance, so that the first display region 231 becomes half-bright light emission, and the color picture in the second display region 232 becomes full-bright light emission.
It can be understood that a chip with touch function is arranged on the circuit board of the light source of a display module, and meanwhile, the touch sensing disc is arranged by using the copper foil on the circuit board, so that the touch function of the display module can be given to the display module, and the touch display module is an efficient and cost-effective touch display module scheme.
Referring to fig. 13, there is shown an exploded view of a structure of still another display module provided by the present invention.
In one possible embodiment, the display module includes: a display film 320, a backlight module including two light guide plates 350 and 390, a side emission light source 370 and a reflector 351.
The display film 320 includes three display areas 321, 322, and 323 connected without gaps, each of which includes a color picture. The display film 320 also includes a diffuser layer 326. The diffuser layer 326 is formed by applying a diffuser coating to the back side of the display film 320. The display film 320 is disposed on the surface of the display module.
The side-emission light source 370 includes a wiring board 374 and three white side- emission diodes 371, 372, and 373.
The light guide plate 350 includes a transparent substrate 359, two dividing lines 357, 358, a refractive region 356, and an input port 354; light guide plate 390 includes a transparent substrate 399, two split lines 392 and 394, two refractive regions 391 and 393, and two input ports 396 and 397.
The light guide plate 350 is disposed below the display film 320, above the line plate 374 and the side light source 370; the size of the refractive region 356 is slightly smaller than the size of the display region 322, e.g., 0.5mm on each of the left and right sides; the location of the refractive region 350 is the same as the location of the display region 322; the light emitting diode 371 is inserted just inside the input port 354, corresponding to the refractive region 356; parting lines 357 and 358 are two slits separating refractive region 356 from other regions.
The light guide plate 390 is disposed under the display film 320, the circuit board 374 and the side light source 370, and the refractive areas 391 and 393 are slightly smaller than or equal to the display areas 321 and 323, respectively, in size above the reflector 351, such as 1mm on both left and right sides, respectively; the positions of the refractive regions 391 and 393 are the same as the positions of the display regions 321 and 323, respectively; the light emitting diodes 372 and 373 are inserted just inside the two input ports 396 and 397, respectively, corresponding to the refractive regions 391 and 393, respectively; parting lines 392 and 394 are two slits separating the two refractive regions 391 and 393 from the other regions; the length of split lines 392 and 394 exceeds the length of the refractive regions that require separation. Thus, light emitted by the light emitting diode can rarely propagate into the refraction area which is not corresponding to the light emitting diode.
When the light emitting diode 371 is turned on, the other two light emitting diodes 372 and 373 are turned off, the side light source 370 emits white light, the white light is emitted from the input port 354 and enters the transparent substrate 359 to be transmitted, most of the light is transmitted to the refraction area 356 to be refracted, so that part of the light is emitted upwards from the direction perpendicular to the transparent substrate 359 to the display area 322, and the other part of the light is emitted from the back of the transparent substrate 359, passes through the transparent substrate 399 and then is reflected by the reflector 351 and is emitted from the bottom to the transparent substrates 399 and 359 again to be transmitted for the second time until the light is emitted above the transparent substrate 359; the emitted light passes through the diffusion layer 326 and the display area 322 having a non-uniform transmittance, so that the color picture on the display area 322 becomes luminous.
At the same time, near the edges of parting lines 357 and 358, a small portion of the light is transmitted or refracted out of transparent substrate 359 and into the interstices of parting lines 357 and 358; some of these rays will strike the two areas where display areas 322 and 321 and 323 meet, adding a thin line of light to each of these two areas;
the other portion continues to travel into transparent substrate 359 after traveling to the other wall of parting lines 357 and 358, traveling in the non-refractive regions corresponding to display regions 321 and 323, where the number of light rays is very limited to a negligible extent, so that the brightness of the color picture over display regions 321 and 323 is unchanged. Finally, on the surface of the display module, one luminescent color picture is formed in the display area 322 and the areas of the dividing lines 357 and 358, and two non-luminescent color pictures are formed in the display areas 321 and 323, respectively.
When the light emitting diode 372 is turned on, the other two light emitting diodes 371 and 373 are turned off, the side light source 370 emits white light, the white light is emitted from the input port 396 and enters the transparent substrate 399 to be transmitted, most of the light is transmitted to the refraction area 391 to be refracted, so that part of the light is emitted upwards from the direction perpendicular to the transparent substrate 399, the light passes through the transparent substrate 359 to the display area 321, and the other part of the light is emitted from the back of the transparent substrate 399 to be reflected by the reflector 351 and then is emitted from the bottom to enter the transparent substrate 399 again to be transmitted for the second time until the light is transmitted above the transparent substrate 359; the emitted light passes through the transparent substrate 359, the diffusion layer 326 and the display area 321 with non-single transmittance, so that the color picture on the display area 321 becomes luminous.
Meanwhile, near the edge of the dividing line 392, a small portion of the light is transmitted or refracted to be emitted from the transparent substrate 399 and then enters the gap of the dividing line 392; some of these light rays will pass through the transparent substrate 359 and the light diffusion layer 326 to the area where the display areas 321 and 322 meet, adding a thin line of light emission to this area of intersection;
a further portion continues to propagate to the other wall of split line 392 and then again into transparent substrate 399, corresponding to the non-refractive region of display area 322, where the number of light rays is very limited and negligible, so that the brightness of the color image above display areas 322 and 323 is unchanged. Finally, on the surface of the display module, one luminescent color picture is formed in the display area 321 and the division line 357, and two non-luminescent color pictures are formed in the display areas 322 and 323, respectively.
When the light emitting diode 373 is turned on, the other two light emitting diodes 371 and 372 are turned off, and the side light source 370 emits white light, which is emitted from the input port 397 into the transparent substrate 399 to propagate. The same principle is that, through propagation, refraction and reflection, finally, on the surface of the display module, one luminous color picture is formed in the display area 323 and the area of the dividing line 358, and two non-luminous color pictures are formed in the display areas 321 and 322 respectively.
It can be appreciated that by distributing leds on the front and back sides of the circuit board, the problem of a relatively narrow number of display areas of the display membrane can be solved.
Referring to fig. 14, another display module provided by the present invention includes another light guide plate.
In one possible embodiment, the display module includes a light guide plate 390, two input ports 316 and 317 including a transparent substrate 319, dividing lines 315, and four refractive regions 311, 312, 313, and 314.
The light guide plate 390 is disposed under the display film 320, the circuit board 374 and the side light source 370, above the reflector 351, and the refractive regions 311 and 313 have a size slightly smaller than or equal to that of the display regions 321 and 323, respectively, such as 1mm on both left and right sides, respectively; the positions of the refraction areas 311 and 313 are the same as the positions of the display areas 321 and 323, respectively; the dimensions of the refractive regions 312 and 314 are slightly less than or equal to half the dimensions of the display region 322, such as 1mm on each of the left and right sides; the positions of the refraction areas 312 and 314 are the same as the positions of the left and right half of the display area 322, respectively; the light emitting diodes 372 and 373 are inserted just inside the two input ports 316 and 317, respectively, corresponding to the refractive regions 311 and 312, 313 and 314, respectively; parting line 315 is a slit separating refractive regions 311 and 312 and refractive regions 313 and 314; the length of the split line 315 exceeds the length of the refractive region that is required to be split. Meanwhile, an included angle formed by a straight line from the top end of the dividing line 315 to the corresponding light emitting diode and a straight line perpendicular to the plane of the light emitting diode is greater than 60 degrees; thus, light emitted by the light emitting diode can rarely propagate into the refraction area which is not corresponding to the light emitting diode. The refractive indexes of the refractive regions 311 and 312 are different, so that after the corresponding light emitting diode is turned on to emit light, the number of light rays emitted from the position of the refractive region 312 is larger than the number of light rays emitted from the position of the refractive region 311 by a certain amount, and the number of light rays is the same as the number of light rays lost when the light rays pass through the refractive region 356. Finally, the number of light rays corresponding to the positions of the refractive regions 311 and 312 is almost the same when reaching the display film.
When the light emitting diode 371 is turned on, the other two light emitting diodes 372 and 373 are turned off, the side light source 370 emits white light, and the white light is emitted from the input port 354 into the transparent substrate 359 for propagation, refraction, reflection, etc., and finally, on the surface of the display module, a luminous color picture is formed in the display area 322, the dividing lines 357 and 358, and two non-luminous color pictures are formed in the display areas 321 and 323, respectively.
When the led 372 is turned on, the other two leds 371 and 373 are turned off, the side light source 370 emits white light, and the white light is transmitted, refracted, reflected, etc. from the input port 316 into the transparent substrate 319, and finally, a half-luminous color picture is formed on the surface of the display module in the display area 321 and the half of the display area 322 next to the display area 321, and a half-non-luminous color picture is formed in the other half of the display area 322 and the display area 323.
When the two leds 372 and 371 are turned on, the leds 373 are turned off, the side-emission light source 370 emits white light, and the white light is transmitted, refracted, reflected, etc. from the input ports 316 and 354 into the transparent substrates 319 and 359, and finally, two half-emission color pictures are formed on the surface of the display module in the display areas 321 and 322, and a non-emission color picture is formed in the display area 323. The luminance of the lighted color picture at the position of the half display area 322 next to the display area 321 is almost doubled compared with the other lighted color pictures.
It can be understood that by superposing the refraction areas, the backlight module can control the local brightness in the backlight area, and is particularly suitable for backlight application with multiple brightness or gradual change effect, so that the application scene of the backlight is expanded.
Referring to fig. 15, there is shown an exploded view of a structure of still another display module provided by the present invention.
In one possible embodiment, the display module includes: a hiding layer 410, a display film 430, a backlight module comprising two light guide plates 440 and 480, a light shielding film 470 and a side-emitting light source 460, a light shielding member 490, a reflector 415.
The color of the hiding layer 410 is black, the light transmittance is about 13%, the back surface of the hiding layer 410 comprises a double-sided tape frame 411, the hiding layer 410 is arranged on the surface of the display module, and the double-sided tape frame 416 corresponds to the light-shielding outer frame 491 above the light-shielding component 490.
The display film 430 includes two display areas 431 and 432 connected without gaps, each of which includes a color picture; display areas 431 and 432 include one display area 433 and 434, respectively; the display membrane 430 is positioned below the hidden layer 410 and inside the shade assembly 490.
The side-emission light source 460 includes a wiring board 469 and six white side- emission diodes 461, 462, 463, 464, 465, and 466.
The light guide plate 440 includes a transparent substrate 441 having a light transmittance of 95%, a refractive region 442, and four input ports;
the light guide plate 480 includes a transparent substrate 481 having a light transmittance of 95%, two refractive regions 483 and 484, a dividing groove 482 and two input ports; the length of the dividing groove 482 exceeds the length of the refractive region requiring separation. Meanwhile, an included angle formed by a straight line from the top end of the dividing groove 482 to the light emitting diode and a straight line perpendicular to the plane of the light emitting diode is greater than 60 degrees; thus, light emitted by the light emitting diode can rarely propagate into the refraction area which is not corresponding to the light emitting diode.
The light shielding film 470 includes one light shielding region 471 and two transparent regions 473 and 474; the light shielding region 471 is low in light transmittance, such as 20% in light transmittance; the light shielding region 471 has a certain reflectivity, such as 40% reflectivity, and the transparent regions 473 and 474 are light transmissive, such as 90% transmittance.
The light shielding component 490 comprises a light shielding frame 491, a light shielding region 493 and a light shielding wall 498; the light-shielding region 493 is slightly larger than the transparent substrate 481, such as 0.4mm; the height of the light barrier 498 is almost the same as the thickness of the light guide plate 480.
The light guide plate 440 is disposed below the display film 430 and inside the light shielding member 490, above the side light sources 460 and the light shielding film 470; the refractive region 442 is sized larger or slightly smaller than the display regions 433 and 434, such as 0.5mm on one side; the refractive region 442 covers exactly the display regions 431 and 432; the light emitting diodes 461, 462, 463, 464 are inserted just inside the four input ports of the light guide plate 440.
The light shielding film 470 is disposed under the light guide plate 440 and inside the light shielding member 490, and the transparent regions 473 and 474 correspond to the display regions 433 and 434, respectively; the dimensions of the transparent regions 473 and 474 are the same size or slightly smaller than the dimensions of the regions of the display regions 433 and 434, such as 0.5mm on one side;
the light guide plate 480 is disposed under the light shielding film 470 and the side emission light source 460, inside the light shielding member 490. Refractive regions 483 and 484 correspond to display regions 433 and 434; the light emitting diodes 465, 466 are inserted just inside the two input ports of the light guide plate 480, corresponding to the refractive regions 483 and 484, respectively. The light guide plate 480 is disposed inside the light shielding member 490, and the dividing grooves 482 are blocked with respect to the light shielding walls 498.
When all the light emitting diodes 461-466 are turned off and the light source does not emit light, the ambient light irradiates the surface of the display module, 13% of the light of the ambient light passes through the hidden layer 410, and the light of the ambient light after passing through different areas of the display film, the light guide plate, the shading film, the light guide plate and the reflective paper after being reflected by the hidden layer 410 is less than 1%, so that the light of the ambient light after passing through different areas of the display film, the light guide plate, the shading film, the light guide plate and the reflective paper after being hidden is almost invisible. Under ambient light, only one black surface of the display module is visible.
When the light emitting diodes 461, 462, 463 and 464 are turned on, the light emitting diodes 465 and 466 are turned off, the side light source 460 emits white light, and the white light is emitted from the four input ports of the light guide plate 440 and is transmitted into the transparent substrate 441, most of the light is transmitted to the refraction area 442 to be refracted, so that a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 441 to the display areas 433 and 434, and a part of the light is emitted from the back surface of the transparent substrate 441, wherein most of the light reflected by the light shielding area 471 is reflected to be about 40% of the light to be re-emitted from the bottom to the transparent substrate 441; a further portion passes continuously through the transparent regions 473 and 474, the transparent substrate 481, and then re-enters the transparent substrate 481 from the bottom by reflection from the reflector 415, passes through the transparent regions 473 and 474, and enters approximately 41% of the light transparent substrate 441 from the bottom; these light rays entering the transparent substrate 441 from the bottom propagate through the second time until reaching the top of the transparent substrate 441 and then are emitted; the emitted light passes through the display areas 431 and 432 and the hidden layer 410, and changes the color pictures on the display areas 431 and 432 to be light-emitting. Finally, two luminous color pictures are formed on the surface of the display module in the display areas 431 and 432; the brightness within and outside of display areas 433 and 434 are nearly similar.
When the light emitting diodes 461, 462, 463, 464 and 465 are turned on, the light emitting diode 466 is turned off, and the side light source 460 emits white light. Light emitted from the light emitting diodes 461, 462, 463 and 464 is transmitted through the four input ports of the light guide plate 440 into the transparent substrate 441, most of the light is transmitted to the refraction region 442 for refraction, so that a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 441 into the display regions 433 and 434, and a part of the light is emitted from the back of the transparent substrate 441, wherein most of the light reflected by the light shielding region 471 is reflected to about 40% from the bottom and is transmitted to the transparent substrate 441 again; a further portion passes continuously through the transparent regions 473 and 474, the transparent substrate 481, and then re-enters the transparent substrate 481 from the bottom by reflection from the reflector 415, passes through the transparent regions 473 and 474, and enters approximately 41% of the light transparent substrate 441 from the bottom; these light rays entering the transparent substrate 441 from the bottom propagate through the second time until reaching the top of the transparent substrate 441 and then are emitted; the emitted light passes through the display areas 431 and 432 and the hidden layer 410, and changes the color pictures on the display areas 431 and 432 to be light-emitting; the brightness within and outside of display areas 433 and 434 are nearly similar.
Light emitted by the light emitting diode 465 is transmitted from the corresponding input port of the light guide plate 480 into the transparent substrate 481, and most of the light is transmitted to the refraction area 483 for refraction, so that a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 481; a part of light rays are reflected by the reflector 415 after being emitted from the back of the transparent substrate 481, are emitted from the bottom into the transparent substrate 481 again, and are transmitted for the second time until being above the transparent substrate 481 and then are emitted; these light rays emitted from the transparent substrate 481 pass through the light shielding film 470, and the inside of the transparent regions 473 and 474 can pass through 90% of the light rays; outside the transparent regions 473 and 474, the emitted light is limited because it is not above the refractive regions, and in addition, only 10% of the light can pass through the light shielding film 470, the light outside the transparent regions 473 and 474 is negligible.
Light passing through the transparent region 473 is then emitted from the bottom into the transparent substrate 441, propagates until it is above the transparent substrate 441, and then is emitted; the emitted light passes through the display area 433 and the hidden layer 410, causing the display area 433 within the luminescent color picture above the display area 431 to become brighter. In addition, light emitted from the light emitting diode 465 enters the transparent substrate 481 to bypass the dividing grooves 482 and propagate to the refractive regions 484 with little, if any, light. Finally, two luminous color pictures are formed on the surface of the display module in the display areas 431 and 432; the brightness within the display area 433 is much higher, such as doubled, than the brightness outside; the brightness within and outside of the display area 434 is nearly similar.
When the light emitting diodes 461, 462, 463, 464 and 466 are turned on, the light emitting diode 465 is turned off, and the side light source 460 emits white light. In accordance with the principles described above, the light emitted from the light emitting diodes 461, 462, 463 and 464 causes the color pictures on the display areas 431 and 432 to become luminous; the brightness within and outside of display areas 433 and 434 are nearly similar. The light emitted by the light emitting diode 466 causes the display area 434 within the luminescent color picture above the display area 432 to become brighter. Finally, two luminous color pictures are formed in the display areas 431 and 432 on the surface of the display module; the brightness within and outside of the display area 433 is nearly similar, with the brightness within the display area 434 being much higher, such as doubled, than the brightness outside of the display area;
it can be understood that, by arranging the light emitting diodes and the corresponding front light guide plate and back light guide plate on the front and back sides of the circuit board, the display module can provide gapless display interfaces with different brightness in local display areas, a background color display interface composed of a plurality of gapless luminous color pictures, and a color display interface composed of the background color display interface and a plurality of highlight small areas. These highlighted small areas may represent indicator lights or keys.
In particular, the display module includes a further side-emitting light source 460 including a circuit board 469, four white side-emitting diodes 461, 462, 463 and 464, and two green side-emitting diodes 465 and 466.
Therefore, the display module can provide gapless display interfaces with different brightness and different colors in the local display area: a background color display interface composed of a plurality of gapless luminous color pictures, and a color display interface composed of the background color display interface and a plurality of greenish and highlight small areas.
Referring to fig. 16, there is shown an exploded view of a structure of still another display module provided by the present invention.
In one possible embodiment, the display module includes a display membrane 435 and the further backlight module includes two light guide plates 440 and 485, a light blocking membrane 475 and two side-emitting light sources 420 and 450, a light blocking assembly 490, and a reflector 451.
The display membrane 435 includes two display areas 436 and 437 connected without gaps, each display area including a color picture; the display areas 436 and 437 include one display area 438 and 439, respectively; the display membrane 435 is positioned below the hidden layer 410 and inside the light shield assembly 490.
The light guide plate 485 includes a transparent base 486 having a light transmittance of 95%, two refractive areas 488 and 489, and a dividing groove 487; the length of the dividing groove 487 exceeds the length of the refractive region requiring separation. Meanwhile, an included angle formed by a straight line from the top end of the dividing groove 487 to the light emitting diode and a straight line perpendicular to the plane of the light emitting diode is larger than 60 degrees; thus, light emitted by the light emitting diode can rarely propagate into the refraction area which is not corresponding to the light emitting diode.
The side-emission light source 420 includes a wiring board 429, four white side- emission diodes 421, 422, 423, and 424, and two pin holes 427 and 428.
The side-emission light source 450 includes a circuit board 459, two white side- emission diodes 455 and 456, two pins 457 and 458, two touch- sensitive discs 453 and 454, a touch light control chip 452, and a reflector 451; the size of the wiring board 459 is slightly smaller than the light-shielding frame 491. The side light source 420 is disposed under the light guide plate 440 and inside the light shielding member 490 body, and the light emitting diodes 421, 422, 423, 424 are inserted just inside the four input ports of the light guide plate 440. The light shielding film 470 is disposed below the light guide plate 440 and above the light guide plate 480; the light shielding film 470 and the light guide plate 480 are disposed beside the side light source 420; the positions of the refractive regions 488 and 489 on the light guide plate 480 correspond to the display regions 438 and 439 on the display film 435, respectively.
The side-emitting light source 450 is disposed below the light-shielding member 490 and is recessed inside the light-shielding casing 491. The positions of the touch- sensitive pans 453 and 454 correspond to the display areas 438 and 439 on the display membrane 435, respectively. Two display areas with touch key functions are formed on the surface of the display module.
The touch sensing pads 453 and 454 are formed of copper foil on the circuit board. The side light source 420 is disposed above the side light source 450, and two pins 457 and 458 pass through pin holes 427 and 428, respectively, and are soldered above the side light source 420; the touch light control chip 452 is connected to the touch sensing pads 453 and 454, the side light emitting diodes 455 and 456, and the side light emitting diodes 421, 422, 423 and 424 through traces and pins 457 and 458 on a wiring board 459.
When the power is turned on to the side light source 450, the touch light control chip 452 immediately reads an initial capacitance value of the touch sensing pads 453 and 454; meanwhile, touching the light control chip 452 turns on the light emitting diodes 421, 422, 423, and 424, turns off the light emitting diodes 455 and 456; the light emitting diodes 421, 422, 423 and 424 emit white light, which is transmitted, refracted and reflected from the four input ports of the light guide plate 440 into the transparent substrate 441, and finally, a portion of the light is emitted upward from the transparent substrate 441 in a direction perpendicular to the transparent substrate 441 to the display areas 436 and 437; the emitted light passes through the display regions 436 and 437 of non-single transmittance, causing the color pictures on the display regions 436 and 437 to become luminous visible. The brightness within and outside of the display areas 438 and 439 is almost similar.
When the finger touches the display area 438 of the hidden layer 410, the touch sensing pad 453 corresponding to the finger generates another capacitance value, where the difference between the capacitance value and the initial capacitance value is greater than the set threshold value, the touch light control chip 452 determines that the display area 436 with the touch key function is touched. According to the previous design, touch light control chip 452 remains on LEDs 421, 422, 423, and 424, remains off LED 456, and updates on LED 455; the light emitting diodes 421, 422, 423, and 424 emit white light to make the color pictures on the display areas 436 and 437 visible. White light emitted from the light emitting diode 455 is incident into the transparent substrate 486; a substantial portion of the light propagates, refracts, and reflects on the side of the dividing groove 487 that includes the refracting region 488, and finally, a portion of the light is emitted upward from the direction perpendicular to the transparent substrate 486, and sequentially passes through the transparent region 478, the transparent substrate 486, the display region 438, and the hiding layer 410 of the light-shielding film 475, so that the display region 438 in the luminescent color picture on the display region 436 becomes brighter. Finally, two luminous color pictures are formed on the surface of the display module in the display areas 436 and 437; the brightness within the display area 438 is much higher, such as doubled, than outside; the brightness within and outside the display area 439 is almost similar.
When the finger touches the display area 439 of the hidden layer 410, the touch light control chip 452 determines that the display area 439 with the touch key function is touched. In accordance with the previous design, touch light control chip 452 remains on LEDs 421, 422, 423, 424, and 455, updating on LED 456; the light emitting diodes 421, 422, 423, and 424 emit white light to make the color pictures on the display areas 436 and 437 visible. The white light emitted by the light emitting diode 455 causes the display area 438 within the luminescent color picture above the display area 436 to become brighter. White light emitted from the light emitting diode 456 is transmitted through the transparent substrate 486, refracted, reflected, and transmitted through the transparent region 479, the transparent substrate 486, the display region 439, and the hidden layer 410 of the light shielding film 475, so that the display region 439 of the luminescent color picture on the display region 437 becomes brighter. Finally, two luminous color pictures are formed on the surface of the display module in the display areas 436 and 437; the brightness within the display areas 438 and 439 is much higher, e.g., doubled, than the brightness outside.
It can be understood that a chip with touch function is arranged on a circuit board of one of the light sources in a display module, and meanwhile, a copper foil on the circuit board is used for arranging a touch sensing disc, so that the touch function of the display module can be given. The touch display module scheme is efficient and cost-effective.
Referring to fig. 17, there is shown an exploded view of a structure of still another display module provided by the present invention.
In one possible embodiment, the display module includes: the hidden layer 510, the upper light guide plate 540, the upper light source 567, the display film 530, and the backlight module, which includes the light guide plate 580, the side light source 560, and the reflector 515.
The color of the hiding layer 510 is black, the light transmittance is about 13%, and the hiding layer 510 is disposed on the surface of the display module.
The upper light guide plate 540 includes a transparent substrate 544 having a light transmittance of 95%, two refractive regions 541 and 542 having a high light transmittance and a low refractive index, and two input ports. The light transmittance of the refractive regions 541 and 542 is, for example, 85%, and the refractive index is, for example, 10%. The upper light guide plate 540 is disposed under the hidden layer 510.
The display film 530 includes two display areas 531 and 532 connected without gaps, each of which includes a color picture; the display film 530 is disposed under the upper light guide plate 540.
The side-emission light source 560 includes a wiring board 569 and four white side- emission light diodes 563, 564, 565, and 566 on the back surface thereof.
The upper side light source 567 includes two white side light emitting diodes 561 and 562. The light emitting diodes 561 and 562 are disposed on the front surface of the wiring board 569.
The light guide plate 580 includes a transparent substrate 584 having a light transmittance of 95%, two refractive regions 581 and 582, and four input ports; the length of parting line 583 exceeds the length of the refractive region that needs to be separated. Meanwhile, an included angle formed by a straight line from the top end of the parting line 583 to the light emitting diode and a straight line perpendicular to the plane of the light emitting diode is larger than 60 degrees; thus, light emitted by the light emitting diode can rarely propagate into the refraction area which is not corresponding to the light emitting diode.
The upper light guide plate 540 is disposed above the display film 530 and the side light source 560, and the light emitting diodes 561 and 562 are inserted just inside the two input ports of the upper light guide plate 540.
The light guide plate 580 is disposed under the display film 530 and the side emission light source 560. The refractive regions 581 and 582 correspond to the display regions 531 and 532; the light emitting diodes 563, 564, 565 and 566 are inserted just inside the four input ports of the light guide plate 580, corresponding to the refractive regions 581 and 582, respectively.
When all the leds 561-566 are turned off and the light source does not emit light, the ambient light irradiates the surface of the display module, the light of 13% of the ambient light passing through the hidden layer 510 is reflected by different areas of the light guide plate, the display film, the light guide plate and the reflective paper after passing through the hidden layer 510, and the light of the ambient light is less than 1% after passing through the hidden layer 510, so that the display film, the light guide plate, the light shielding film, the light guide plate and the reflective paper after being hidden are almost invisible. Under ambient light, only one black surface of the display module is visible.
When the light emitting diodes 563, 564, 565 and 566 are turned on, the light emitting diodes 561 and 562 are turned off, white light emitted from the light emitting diodes 563, 564, 565 and 566 is transmitted, refracted and reflected by the light guide plate 580 through the four input ports of the light guide plate 584, and finally, a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 584 to the display film 530; light passes through the non-single transmittance display areas 531 and 532 causing the color picture thereon to become luminous. The amount of light passing through the display film 530, which then passes through the upper light guide plate 540 and the hidden layer 510, is 10% different between the inside and outside of the refractive regions 541 and 542, which is difficult to be recognized by the naked eye; finally, two luminescent color pictures are formed on the surface of the display module in the display areas 531 and 532.
When the light emitting diodes 561, 563, 564, 565, and 566 are turned on, the light emitting diode 562 is turned off, and the upper side light emitting source 567 and the side light emitting source 560 emit white light. The light emitted from the light emitting diodes 563, 564, 565 and 566 can cause the color pictures on the display areas 531 and 532 to become luminous as described above.
Light emitted by the light emitting diode 561 is emitted into the transparent substrate 544 from the corresponding input port of the upper light guide plate 540 for propagation, and most of the light is transmitted to the refraction region 541 for refraction, so that a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 544; a further portion of the light is reflected by the display film 530 after exiting the back side of the transparent substrate 544, and re-exits the bottom side of the transparent substrate 544, and propagates a second time until reaching the top of the transparent substrate 544, and then exits; these light rays pass through the hidden layer 510 to form a white light emitting pattern, here a white light emitting solid circle, in the shape of the refractive region 541 on the display surface. There is a small number of light rays propagating in the transparent substrate 544 to the refractive region 542, and the refractive index of the refractive region 542 is low, so that the refracted light rays are negligible. Finally, two luminescent color pictures are formed on the surface of the display module in the display areas 531 and 532, wherein the luminescent color picture of the display area 531 includes a white luminescent solid circle.
When the light emitting diodes 562, 563, 564, 565, and 566 are turned on, the light emitting diode 561 is turned off, and the upper side light emitting source 567 and the side light emitting source 560 emit white light. Light emitted from the light emitting diodes 563, 564, 565 and 566 can cause the color pictures on the display areas 531 and 532 to become luminous.
Light emitted by the light emitting diode 562 is emitted into the transparent substrate 544 from the corresponding input port of the upper light guide plate 540 to propagate and refract, so that a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 544; these light rays pass through the hidden layer 510 to form a white light emitting pattern, here a white light emitting rectangular block, in the shape of a refractive region 542 on the display surface. Finally, two luminous color pictures in the display areas 531 and 532 are formed on the surface of the display module, wherein the luminous color picture in the display area 532 includes a white luminous rectangular block.
Therefore, the display module can provide gapless color display interfaces with different contents by adding the light guide plate which adopts the patterns with high light transmittance and low refractive index as the refractive areas: a background color display interface composed of a plurality of gapless luminous color pictures, and a color display interface combined by the background color display interface and the patterns on the light guide plate. These highlighted small areas may represent indicator lights or keys.
In one possible embodiment, the display module further includes: a hiding layer, an upper light guide plate and an upper light source; the low light transmittance of the hidden layer is lower than 30%; the hidden layer is arranged on the surface of the display module; the upper side light-emitting source comprises a light-emitting diode, and the side light-emitting diode and the upper side light-emitting source are arranged on the same circuit board, or the side light-emitting diode is arranged on the circuit board of the side light-emitting source; the upper light guide plate comprises a transparent substrate, a refractive region with high light transmittance and low refractive index and an input port; the light guide plate is arranged between the hiding layer and the display membrane; the light emitting diode in the upper side light emitting source is arranged at the input port of the upper light guide plate.
Referring to fig. 18, another display module provided by the present invention includes another display film with a hidden layer.
In one possible embodiment, the display membrane 535 comprises a hidden layer 538, two display areas 536 and 537 connected without gaps, each display area comprising a color picture; the concealing layer 538 is black in color and has a light transmittance of about 30%; a hidden layer 538 is disposed on the surface of the display membrane 535. The display film 530 is disposed below the light guide plate 540, and above the light guide plate 580 and the side light source 560.
When all leds 561-566 are turned off, the light source does not emit light, and only one black surface of the display module is visible under ambient light.
When light emitting diode 561 is turned on, light emitting diodes 562, 563, 564, 565, and 566 are turned off. Light emitted by the light emitting diode 561 is emitted into the transparent substrate 544 from the corresponding input port of the light guide plate 540 for propagation, and most of the light is transmitted to the refraction region 541 for refraction, so that a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 544; these light rays pass through the hidden layer 510 to form a white light emitting pattern, here a white light emitting solid circle, in the shape of the refractive region 541 on the display surface. A further portion of the light, after exiting the back of the transparent substrate 544, is almost completely absorbed by the hidden layer 538 on the display membrane 535, with almost no reflection; finally, a white luminous solid circle on the black ground color is formed on the surface of the display module in the display areas 531 and 532; the positions of the white light-emitting solid circles correspond to the positions of the refractive regions 541.
It can be understood that the display module is provided with a hidden layer on the display membrane, so that the patterns on the light guide plate are not interfered by the light emission of the color membrane behind the light guide plate, and the patterns on the light guide plate are more uniform and have higher visibility.
Referring to fig. 19, there is shown an exploded view of a structure of still another display module provided by the present invention.
In one possible embodiment, the display module includes a hidden layer 510, a touch film 520, a display film 530, and a backlight module includes two light guide plates 540 and 580, a side-emitting light source 570, and a reflector 515.
The touch film 520 includes a transparent region 523 having a light transmittance of more than 90%, two transparent touch sensing regions 521 and 522, and an FPC connection terminal 524; the touch film 520 is disposed below the hidden layer 510 and above the light guide plate 540.
The side light source 570 includes a wiring board 569, six white side light emitting diodes 571, 572, 573, 574, 575, and 576, a touch light control chip 577, and an FPC connector 578. White side light emitting diodes 571 and 572 are disposed on the front surface of the wiring board 569, and white side light emitting diodes 573, 574, 575 and 576 are disposed on the back surface of the wiring board 569.
The side light source 570 is disposed below the light guide plate 540 and the display film 530, above the light guide plate 580; the light emitting diodes 571 and 572 are inserted into just two input ports of the light guide plate 540, and the light emitting diodes 573, 574, 575, and 576 are inserted into just four input ports of the light guide plate 580. The FPC connection terminal 524 of the touch diaphragm 520 is inserted into the FPC connector 578 by bypassing the light guide plate 540 and the display diaphragm 530, and is connected to the touch light control chip 577 through wiring on the wiring board 569; the transparent touch- sensitive areas 521 and 522 are located corresponding to the display areas 531 and 532, respectively, on the display film 530. The transparent region 523 covers the entire display regions 531 and 532. Two display areas with touch key functions are formed on the surface of the display module.
Transparent touch- sensitive areas 521 and 522 are formed of PEDOT transparent conductive ink or ITO transparent conductive material or nano-silver mesh, or the like.
When the power-on side light source 570 is turned on, the touch light control chip 577 immediately reads an initial capacitance value of the transparent touch sensing areas 521 and 522; meanwhile, according to the previous design procedure, the touch light control chip 577 turns on the light emitting diodes 573, 574, 575 and 576, and turns off the light emitting diodes 571 and 572; the white light emitted by the light emitting diodes 573, 574, 575 and 576 causes the color pictures on the display areas 531 and 532 to become luminous and visible. Finally, two luminescent color pictures are formed on the surface of the display module in the display areas 531 and 532.
When the finger touches the display area 531 of the hidden layer 510, another capacitance value is generated by the transparent touch sensing area 521 corresponding to the finger, where the difference between the capacitance value and the initial capacitance value is greater than the set threshold value, the touch light control chip 577 determines that the display area 531 with the touch key function is touched. According to the previous design, the touch light control chip 577 keeps the light emitting diodes 573, 574, 575 and 576 turned on, keeps the light emitting diode 572 turned off, and updates the light emitting diode 571 turned on; the light emitted from the light emitting diodes 573, 574, 575 and 576 can cause the color pictures on the display areas 531 and 532 to become luminescent as described above. Light emitted by the light emitting diode 571 is emitted into the transparent substrate 544 from the corresponding input port of the light guide plate 540 to propagate and refract, so that a part of the light is emitted upwards from the direction perpendicular to the transparent substrate 544; these light rays pass through the hidden layer 510 to form a white light emitting pattern, here a white light emitting solid circle, in the shape of the refractive region 541 on the display surface. Finally, two luminescent color pictures are formed on the surface of the display module in the display areas 531 and 532, wherein the luminescent color picture of the display area 531 includes a white luminescent solid circle.
When the finger touches the position of the display area 532 of the hidden layer 510, the touch light control chip 577 determines that the display area 532 with the touch key function is touched. In accordance with the previous design, the touch light control chip 577 keeps the light emitting diodes 571, 573, 574, 575 and 576 turned on, updating the light emitting diode 572 turned on; the white light emitted by the light emitting diodes 573, 574, 575 and 576 causes the color pictures on the display areas 531 and 532 to become luminous and visible. The white light emitted from the light emitting diode 571 may form a white light emitting pattern in the shape of the refractive region 541, here, a white light emitting solid circle, on the display surface. The white light emitted from the light emitting diode 572 may form a white light emitting pattern, here a white light emitting rectangular block, in the shape of a refractive region 542 on the display surface. Finally, two luminous color pictures are formed on the surface of the display module in the display areas 531 and 532; wherein the luminescent color pictures of the display areas 531 and 532 respectively comprise a white luminescent solid circle and a white luminescent rectangular block.
It can be understood that a touch function can be given to a display module by arranging a chip with a touch function on a circuit board of one of the light sources in the display module and adding a touch membrane. This is another efficient and cost-effective touch display module solution.
In the above embodiments, one, a plurality or a group of leds are sometimes used in the light-emitting source, and a group of leds may be formed by one or a plurality of leds, which is merely illustrative and not restrictive, and one or a plurality of leds may be used as required in the actual product.
The light emitting diodes described in the side-emitting light sources of the above-described embodiments are disposed on the front and rear surfaces of the wiring board, respectively, because they are not on the same plane. The actual product can be realized by other methods, such as that the light emitting diodes are respectively arranged on two different circuit boards, and the two circuit boards are connected together by using pins or other connection methods.
The touch light control chip in the embodiments described above describes an integrated touch and light control function module, which may be composed of different modules, for example, a chip having both a touch function and a single-chip microcomputer function, or a touch chip and a single-chip microcomputer. Meanwhile, the singlechip can directly control the lamplight or control the lamplight through a triode or a light-emitting diode driving chip.
The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of the present invention, should be included in the scope of the claims of the present invention.
Claims (10)
1. A display module, comprising: the display membrane and the backlight module are arranged in a stacked mode;
the display membrane is arranged on the surface of the display module, and at least comprises a first display area and a second display area, wherein the first display area and the second display area are connected or overlapped together without gaps, the first display area is used for displaying first content, and the second display area is used for displaying second content;
the backlight module comprises at least a first backlight area, a second backlight area and a spacer, wherein the first backlight area is connected with or overlapped with the second backlight area, the first backlight area is arranged below the first display area, the second backlight area is arranged below the second display area, light emitted by each backlight area is upward and can completely cover the corresponding display area, the spacer is arranged below the first backlight area and the second backlight area, and when only the first backlight area emits light, the quantity of the light which is transmitted to the area which is beyond the first backlight area and is intersected with the second backlight area is smaller than a preset proportion of the total quantity of the light transmitted by the first backlight area, so that almost no light is transmitted between the first backlight area and the second backlight area.
2. The display module of claim 1, wherein the backlight module comprises a light shielding assembly and a positive light source;
the shading component is arranged above the positive luminous light source and below the display membrane;
the positive light-emitting source comprises a circuit board, a first front light-emitting diode and a second front light-emitting diode, wherein the first front light-emitting diode and the second front light-emitting diode at least comprise a group of front light-emitting diodes;
the shading component comprises a shading frame body and a spacer arranged in the shading frame body, the spacer is a light-isolating wall, the light-isolating wall is an unsealed wall or a sealed enclosing wall, the height of the light-isolating wall is lower than that of the shading frame body, the thickness of the light-isolating wall is gradually thinned in the height direction, the thickness of the top end of the light-isolating wall is 0.2mm to 0.6mm, the light-isolating wall separates a first backlight area and a second backlight area, a first front light-emitting diode is arranged in the first backlight area, and a second front light-emitting diode is arranged in the second backlight area.
3. The display module of claim 2, wherein the backlight module comprises a light shielding assembly and a light guide plate assembly;
The light guide plate assembly comprises a first light guide plate and a second light guide plate which are connected with each other, and the joint of the first light guide plate and the second light guide plate is not chamfered;
the shading component is arranged above the positive luminous light source and below the display membrane;
the light shielding component comprises a light shielding frame body with hollowed left and right ends and three light isolation walls, wherein the light shielding frame body is provided with steps, the light guide plate component is arranged on the steps and the three light isolation walls, and the surface of the light guide plate component is level with the surface of the light shielding frame body;
the thickness of each light-isolating wall gradually becomes thinner in the height direction, the three light-isolating walls are respectively arranged at two ends and inside the light-shielding frame body, the three light-isolating walls divide the first backlight area and the second backlight area, the first front light-emitting diode is arranged in the first backlight area, and the front light-emitting diode is arranged in the second backlight area.
4. The display module of claim 1, wherein the backlight module comprises a light guide plate, a reflector, and a side-emitting light source;
the side-emitting light source comprises a circuit board, a first side light emitting diode and a second side light emitting diode, wherein the first side light emitting diode and the second side light emitting diode at least comprise a group of side light emitting diodes;
The light guide plate comprises a transparent substrate, the separator, a first refraction area, a second refraction area, a first input port and a second input port, wherein the separator is a parting line;
the dividing line is a semi-penetrating or full-penetrating gap on the transparent substrate, the dividing line divides the first refraction area and the second refraction area to form the first backlight area and the second backlight area, the width of the dividing line is smaller than 1mm, the depth of the dividing line is larger than one fourth of the thickness of the transparent substrate, the length of the dividing line is larger than the lengths of the first refraction area and the second refraction area, and an included angle formed by a straight line from the top end of the dividing line to the light emitting diode and a straight line perpendicular to the plane of the light emitting diode is larger than 60 degrees;
the light guide plate is arranged above the reflector and the side-emitting light source, and the light guide plate is arranged below the display membrane;
the first refractive region has a size less than or equal to the size of the first display region, and the second refractive region has a size less than or equal to the size of the second display region;
the first side light emitting diode is arranged in the first input port and corresponds to the first refraction area, and the second side light emitting diode is arranged in the second input port and corresponds to the second refraction area;
The reflector covers the first refractive region and the second refractive region.
5. The display module of claim 1, wherein the backlight module comprises a first light guide plate, a second light guide plate, a reflector, and a side-emitting light source;
the side-emitting light source comprises a circuit board, a first side light emitting diode and a second side light emitting diode, and the first side light emitting diode and the second side light emitting diode are not located on the same plane;
the first light guide plate comprises a first transparent substrate, a first dividing line, a first refraction area and a first input port;
the second light guide plate comprises a second transparent substrate, a second dividing line, a second refraction area and a second input port;
the first parting line and the second parting line are gaps arranged on the first transparent substrate and the second transparent substrate respectively, the first refraction area is separated by the first parting line, the second refraction area is separated by the second parting line, the widths of the first parting line and the second parting line are smaller than 1mm, the depths of the first parting line and the second parting line are respectively larger than one fourth of the thicknesses of the first transparent substrate and the second transparent substrate, the length of the first parting line is larger than the length of the first refraction area, an included angle formed by a straight line from the top end of the first parting line to the first side light emitting diode and a straight line perpendicular to the first side light emitting diode plane is larger than 60 degrees, the length of the second parting line is larger than the length of the second refraction area, and an included angle formed by a straight line from the top end of the second parting line to the second side light emitting diode plane and a straight line perpendicular to the second side light emitting diode plane is larger than 60 degrees;
The first light guide plate and the second light guide plate are overlapped together and are arranged above the reflector and below the display membrane;
the first refraction area and the second refraction area are not covered with each other, the first refraction area corresponds to the first backlight area of the backlight module, and the second refraction area corresponds to the second backlight area of the backlight module;
the reflector covers the first refraction area and the second refraction area;
the first side light emitting diode is arranged in the first input port and corresponds to the first refraction area, and the second side light emitting diode is arranged in the second input port and corresponds to the second refraction area.
6. The display module of claim 1, wherein the first backlight area and the second backlight area are arranged in an overlapping manner, and the backlight module comprises a first light guide plate, a second light guide plate, a reflector and a side-emitting light source;
the side-emitting light source comprises a circuit board, a first side light emitting diode and a second side light emitting diode, and the first side light emitting diode and the second side light emitting diode are not located on the same plane;
The first light guide plate comprises a first transparent substrate, a first dividing line, a first refraction area and a first input port;
the second light guide plate comprises a second transparent substrate, a second dividing line, a second refraction area and a second input port;
the first light guide plate and the second light guide plate are overlapped and arranged above the reflector, the first refraction area is overlapped with the second refraction area, the first refraction area corresponds to the first backlight area of the backlight module, and the second refraction area corresponds to the second backlight area of the backlight module;
the reflector covers the first refraction area and the second refraction area;
the first side light emitting diode is arranged in the first input port and corresponds to the first refraction area, and the second side light emitting diode is arranged in the second input port and corresponds to the second refraction area.
7. The display module assembly of claim 4, further comprising: a hiding layer, an upper light guide plate and an upper light source;
the low light transmittance of the hidden layer is lower than 30%; the hidden layer is arranged on the surface of the display module;
the upper side light-emitting source comprises a group of side light-emitting diodes, and the side light-emitting diodes of the upper side light-emitting source are arranged on a circuit board of the side light-emitting source of the backlight module, or the side light-emitting diodes of the upper side light-emitting source are arranged on a circuit board of the upper side light-emitting source;
The upper light guide plate comprises a transparent substrate, a refractive region with high light transmittance and low refractive index and an input port;
the light guide plate is arranged between the hidden layer and the display membrane;
the side light emitting diode in the upper side light emitting source is arranged at the input port of the upper light guide plate.
8. The display module according to claims 1-7, wherein the display membrane comprises at least two first display areas and second display areas connected without gaps, the first display areas comprise first display areas and second display areas, the light transmittance of the first display areas is different from that of the second display areas, the second display areas comprise third display areas and fourth display areas, and the light transmittance of the third display areas is different from that of the fourth display areas;
the backlight module comprises at least a first backlight area and a second backlight area, wherein the first backlight area comprises a first backlight subarea and a second backlight subarea, the brightness of the first backlight subarea is different from that of the second backlight subarea, the second backlight area comprises a third backlight subarea and a fourth backlight subarea, and the brightness of the third backlight subarea is different from that of the fourth backlight subarea;
The first display area and the second display area correspond to the first backlight area and the second backlight area respectively; the first display sub-region, the second display sub-region, the third display sub-region and the fourth display sub-region correspond to the first backlight sub-region, the second backlight sub-region, the third backlight sub-region and the fourth backlight sub-region, respectively;
the brightness of a backlight sub-region is proportional to the light transmittance of the corresponding display sub-region.
9. The display module of claims 1-7, wherein the side-emitting light source further comprises a touch sensing disc and a touch chip, the display membrane is provided with a display area corresponding to the touch sensing disc, the touch sensing disc is arranged below the display area corresponding to the touch sensing disc, the touch sensing disc is formed by a conductive medium, such as a copper foil on a circuit board, and the touch sensing disc is electrically connected with the touch chip through the circuit board.
10. The display module of claims 1-7, further comprising: touch membrane, touch chip and FPC connector;
the touch membrane comprises a transparent area, a touch sensing area and an FPC (flexible printed circuit) connecting terminal, the touch membrane is arranged below the hidden layer, a display area corresponding to the touch sensing area is arranged on the display membrane, and the touch sensing area is arranged below the display area corresponding to the touch sensing area;
The touch chip and the FPC connector are arranged on the circuit board; the touch sensing area is formed by a conductive medium such as PEDOT or ITO or nano silver wire;
the FPC connection terminal is inserted into the FPC connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310143269.4A CN116312285A (en) | 2023-02-21 | 2023-02-21 | Display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310143269.4A CN116312285A (en) | 2023-02-21 | 2023-02-21 | Display module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116312285A true CN116312285A (en) | 2023-06-23 |
Family
ID=86823219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310143269.4A Pending CN116312285A (en) | 2023-02-21 | 2023-02-21 | Display module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116312285A (en) |
-
2023
- 2023-02-21 CN CN202310143269.4A patent/CN116312285A/en active Pending
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