CN212410996U - Display device - Google Patents

Abstract

The utility model discloses a display device, wherein display device includes side income formula backlight unit, base plate and a plurality of pixel structure. The lateral backlight module comprises a light guide structure, a first light source, a second light source and a brightness control assembly. The first light source is adjacently arranged at the first side edge of the light guide structure and is provided with a plurality of first light emitting assemblies. The second light source is adjacently arranged at the second side edge of the light guide structure, the first side edge is adjacent to the second side edge, and the second light source is provided with a plurality of second light-emitting assemblies. The brightness control assembly is electrically connected with the first light-emitting assembly and the second light-emitting assembly and is used for respectively controlling the light intensity of the first light-emitting assembly and the light intensity of the second light-emitting assembly. The substrate is arranged on the lateral type backlight module, and the pixel structure is arranged on the substrate.

Description

Display device

Technical Field

The present invention relates to a display device, and more particularly to a display device capable of improving a contrast ratio of a display screen and/or reducing power consumption.

Background

Nowadays, display devices are widely used in various electronic products such as notebook computers (notebook computers), smart phones (smart phones), wearable devices, smart watches, and display screens for vehicles to provide more convenient information transmission and display. In the display device with the backlight module, because the brightness provided by the traditional backlight module only has one brightness, the brightness of the backlight module is not changed no matter what the brightness of the picture displayed by the display device, thereby causing unnecessary power consumption. Accordingly, it is necessary to improve this problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a display device, its luminance according to the original gray scale data of picture and the side income formula (Edge lit) backlight module's of adjustment display device light source to reach the effect that promotes picture contrast and/or reduce the power consumption.

In order to solve the above technical problem, the utility model provides a display device, it includes side income formula backlight module, base plate and a plurality of pixel structure. The lateral backlight module comprises a light guide structure, a first light source, a second light source and a brightness control assembly. The first light source is adjacently arranged at the first side edge of the light guide structure and is provided with a plurality of first light emitting assemblies. The second light source is adjacently arranged at the second side edge of the light guide structure, the first side edge is adjacent to the second side edge, and the second light source is provided with a plurality of second light-emitting assemblies. The brightness control assembly is electrically connected with the first light-emitting assembly and the second light-emitting assembly and is used for respectively controlling the light intensity of the first light-emitting assembly and the light intensity of the second light-emitting assembly. The substrate is arranged on the lateral type backlight module, and the pixel structure is arranged on the substrate.

The utility model discloses a luminous intensity that the produced backlight of side income formula backlight unit can be adjusted according to the original grey scale data of picture, consequently, compare in the side income formula backlight unit that the luminous intensity in a poor light can not be adjusted in the tradition, the utility model discloses a side income formula backlight unit can make display device obtain the same or better display quality's picture (for example promote the display frame contrast ratio) under the condition that reduces the electric energy consumption. Additionally, the utility model discloses a light-emitting component that side income formula backlight unit had is far less than the straight following (direct type) backlight unit that the tradition has regional regulation and control function, according to this, the utility model discloses a less light-emitting component of backlight unit accessible carries out regional regulation and control to the luminous intensity of being shaded to reduce cost.

Drawings

Fig. 1 is a schematic cross-sectional view of a display device according to a first embodiment of the present invention.

Fig. 2 is a schematic top view of a lateral backlight module of a display device according to a first embodiment of the present invention.

Fig. 3 is a schematic top view illustrating a corresponding relationship between a light emitting element and a pixel structure of a lateral backlight module according to a first embodiment of the present invention.

Fig. 4 is a flowchart illustrating a method for displaying a picture in a display device according to an embodiment of the present invention.

Fig. 5 is a schematic top view illustrating a light emitting device and a portion of a pixel structure of a lateral backlight module according to an embodiment of the present invention.

Fig. 6 is an exploded view of a light guide structure and a light emitting module of a side-in type backlight module according to a second embodiment of the present invention.

Fig. 7 is a schematic top view of a lateral backlight module of a display device according to a third embodiment of the present invention.

Fig. 8 is a schematic top view of a lateral backlight module of a display device according to a fourth embodiment of the present invention.

Description of reference numerals: 100. 200, 300, 400-side-in type backlight module; 110-a light guiding structure; 110 a-a first side; 110 b-a second side; 110 c-third side; 110 d-fourth side; 120-a first light source; 122-a first light emitting assembly; 130-a second light source; 132-a second light emitting component; 140-a brightness control component; 142-routing; 212-a first light guide plate; 212 a-a first light guide bar; 214-a second light guide plate; 214 a-a second light guide strip; 420-a third light source; 422-a third light emitting assembly; 430-a fourth light source; 432-a fourth light emitting assembly; CC1, CC2, CC3, CC4, CC5, CC 6-pixel corresponding rows; CR1, CR2, CR3, CR4, CR5, CR 6-pixel corresponding columns; d1-first direction; d2-second direction; d3-third direction; DP-display device; a DSL-display architecture layer; PXS, PXS1, PXS2, PXS3 and PXS 4-pixel structures; s1_1, S1_2, S1_3, S1_4, S2_1, S2_2, S2_3, S2_ 4-distances; SB-substrate; ST1, ST2, ST3, ST4, ST 5-steps.

Detailed Description

In order to further understand the present invention, those skilled in the art will be able to specifically list the preferred embodiments of the present invention and to explain the constituent contents and intended functions of the present invention in detail with reference to the accompanying drawings. It should be noted that the drawings are simplified schematic drawings, and therefore, only the components and combinations related to the present invention are shown to provide a clearer description of the basic structure or implementation method of the present invention, and the actual components and layout may be more complicated. In addition, for convenience of description, the components shown in the drawings of the present invention are not drawn to scale according to the actual number, shape, and size of the components, and the detailed scale may be adjusted according to the design requirement.

It is to be understood that the following illustrative embodiments may be implemented by replacing, recombining, and mixing features of several different embodiments without departing from the spirit of the present invention. Features of the embodiments can be arbitrarily mixed and matched without departing from the spirit or conflict of the utility model.

The utility model discloses a display device can be liquid crystal display device (LCD), electrophoretic display device (electrophoretic display) or other suitable display device (generally refer to non-self-luminous display device), just the utility model discloses a display device also can be for having touch-control function's display device (touch-control display device), and the embodiment below explains with liquid crystal display device as an example. It should be noted that the display device may have a display area and a peripheral area located at least one side outside the display area, where the display area is used to display a picture, and the peripheral area does not display the picture. In addition, the display device and the display area may be rectangular, polygonal, circular, or have curved sides (for example, two sides are straight lines, two sides are circular arcs), or other suitable shapes, the display device of the embodiment takes a rectangular display device as an example, and the display area is also rectangular, but the invention is not limited thereto.

Referring to fig. 1 to 3, fig. 1 is a schematic cross-sectional view of a display device according to a first embodiment of the present invention, fig. 2 is a schematic top view of a lateral backlight module of a display device according to a first embodiment of the present invention, and fig. 3 is a schematic top view of a corresponding relationship between a light emitting element and a pixel structure of a lateral backlight module according to a first embodiment of the present invention. As shown in fig. 1 and fig. 2, the display device DP includes a side-in (Edge lit) backlight module 100, a substrate SB and a display structure layer DSL, wherein the substrate SB is disposed on the side-in backlight module 100, and the display structure layer DSL is disposed on the substrate SB. The substrate SB of the present embodiment may comprise any suitable material, for example, the substrate SB may be a rigid substrate or a flexible substrate, and may correspondingly comprise, for example, glass, plastic, quartz, sapphire, Polyimide (PI), and/or polyethylene terephthalate (PET) according to the type of the substrate SB, but the material of the substrate SB is not limited thereto.

As shown in fig. 2, the lateral backlight module 100 of the present embodiment may include a light guide structure 110, a first light source 120, a second light source 130 and a brightness control assembly 140. The light guide structure 110 may be a light guide plate, and the light guide structure 110 may have any suitable shape and have a plurality of sides, the first light source 120 and the second light source 130 are disposed adjacent to each other on different sides of the light guide structure 110, and the light guide structure 110 is used to guide the light emitted from the first light source 120 and the second light source 130 to the substrate SB and the display structure layer DSL to form a backlight (for example, the light guide structure 110 guides the light to the substrate SB and the display structure layer DSL along a normal direction of the surface of the light guide structure 110). In other words, the backlight of the edge-type backlight module 100 is emitted from the light guide structure 110. In the present embodiment, the light guide structure 110 may be rectangular, and has a first side 110a, a second side 110b, a third side 110c and a fourth side 110d, wherein the first side 110a is adjacent to the second side 110b and the fourth side 110d, the second side 110b is adjacent to the first side 110a and the third side 110c, and the third side 110c is adjacent to the second side 110b and the fourth side 110d, but not limited thereto. In other embodiments, the light guide structure 110 may be other polygonal shapes or shapes having curved sides. In addition, the first side 110a of the light guide structure 110 is perpendicular to the first direction D1, the second side 110b is perpendicular to the second direction D2, and the first direction D1 is not parallel to the second direction D2. In the embodiment, since the light guide structure 110 of the embodiment is rectangular, the third side 110c is also perpendicular to the first direction D1, the fourth side 110D is also perpendicular to the second direction D2, and the first direction D1 is perpendicular to the second direction D2. It should be noted that the normal direction of the surface of the light guide structure 110 may be parallel to the third direction D3, wherein the third direction D3 is perpendicular to the first direction D1 and the second direction D2.

The first light source 120 is disposed adjacent to the first side 110a of the light guide structure 110, light emitted from the first light source 120 is emitted to the first side 110a of the light guide structure 110, the second light source 130 is disposed adjacent to the second side 110b of the light guide structure 110, and light emitted from the second light source 130 is emitted to the second side 110b of the light guide structure 110. In the present embodiment, the first light source 120 may have a plurality of first light emitting elements 122, and the second light source 130 may have a plurality of second light emitting elements 132, wherein the first light emitting elements 122 and the second light emitting elements 132 may be organic light-emitting diodes (OLEDs), inorganic light-emitting diodes (LEDs), quantum dot light-emitting diodes (QLEDs, QDLEDs), or other suitable light emitting elements. The first light emitting element 122 and the second light emitting element 132 can emit light of any suitable color, such as white light, but not limited thereto. In the embodiment, since the first light sources 120 are disposed adjacent to the first side edge 110a and the second light sources 130 are disposed adjacent to the second side edge 110b, the first light emitting elements 122 of the first light sources 120 are arranged along a direction perpendicular to the first direction D1 (e.g., the second direction D2), and the second light emitting elements 132 of the second light sources 130 are arranged along a direction perpendicular to the second direction D2 (e.g., the first direction D1). As shown in fig. 2, the number of the first light emitting elements 122 and the number of the second light emitting elements 132 can be adjusted according to requirements, and the number of the first light emitting elements 122 can be the same as or different from the number of the second light emitting elements 132. For example, in fig. 2, the number of the first light emitting elements 122 and the second light emitting elements 132 is 6, but not limited thereto.

The brightness control component 140 can be disposed at any suitable position in the lateral backlight module 100 and electrically connected to the first light source 120 and the second light source 130, wherein the brightness control component 140 is used to control the light intensity of the light emitted by the first light source 120 and the second light source 130. As shown in fig. 2, in the present embodiment, each of the first light emitting elements 122 and each of the second light emitting elements 132 may be electrically connected to the brightness control element 140 through a different wire 142, so that the brightness control element 140 may be used to control the light intensity of the first light emitting element 122 and the light intensity of the second light emitting element 132, but not limited thereto. In the present invention, according to the original gray scale data of the image to be displayed by the display device DP, the brightness control component 140 can correspondingly adjust the light intensity of the light emitted by the first light source 120 and the second light source 130 through an Algorithm (Algorithm) to reduce the power consumption of the display device DP, and the detailed image display method will be described in detail below.

In addition, the edge-type backlight module 100 may optionally include other film layers, structures or components. For example, the lateral backlight module 100 may optionally include a reflective structure, and the light guide structure 110 is disposed between the reflective structure and the substrate SB to reflect the light emitted from the surface of the light guide structure 110 opposite to the substrate SB back to the light guide structure 110, so as to improve the light utilization of the lateral backlight module 100 and improve the light intensity of the backlight. For example, the edge-type backlight module 100 may optionally include a diffusion structure disposed between the light guide structure 110 and the substrate SB for uniformly diffusing the backlight.

The display structure layer DSL may include a plurality of film layers and structures to form a plurality of pixel structures PXS in the display area (i.e., the plurality of pixel structures PXS are disposed on the substrate SB). In detail, each pixel structure PXS of the display structure layer DSL may include a display component, a thin film transistor, and other suitable components (e.g., a capacitor) under the condition that the display device DP is a liquid crystal display device. The electronic components in the pixel structure PXS may be electrically connected to a display driving circuit (e.g., a gate driving circuit (integrated gate driver IGD)) and/or a chip (integrated circuit) in the peripheral region through the data lines and/or the scan lines in the display structure layer DSL, so that the display driving circuit in the peripheral region may drive the electronic components in the pixel structure PXS to display the image. In the present embodiment, each display module may include a portion of a display medium layer (for example, a liquid crystal layer, but not limited thereto), a pixel electrode, and a common electrode, wherein the pixel electrode and the common electrode may generate an electric field through a received display voltage, so as to affect transparency of the display medium layer, so as to control light intensity of the backlight emitted by the lateral backlight module 100 passing through the portion of the display medium layer (i.e., control transmittance of the backlight emitted by the lateral backlight module 100 passing through the pixel structure PXS), and further control brightness of light in a light emitting region of each pixel structure PXS to display a picture, but the operation manner is not limited thereto.

In addition, the display structure layer DSL of the display device DP may further include other suitable film layers or components. In some embodiments, the display structure layer DSL may further include a shielding layer for shielding opaque elements (such as thin film transistors, data lines and scan lines) to reduce the probability of external light being reflected by the opaque elements, wherein the shielding layer may be a single-layer structure or a multi-layer structure. The shielding layer may have a plurality of openings, and the shielding layer may define a top view shape of the light emitting region of the pixel structure PXS through the openings and separate the pixel structures PXS. In some embodiments, the display structure layer DSL may further include a color conversion layer disposed in the pixel structure PXS (e.g., disposed in the opening of the shielding layer) to convert the color of the backlight generated by the edge-type backlight module 100 into other desired colors. For example, when the display device DP is a color display device DP, the color conversion layer may include color conversion portions with different colors, for example, the color conversion layer may include a plurality of red conversion portions, a plurality of green conversion portions, and a plurality of blue conversion portions, which are respectively disposed in different pixel structures PXS, so that the pixel structures PXS may be one of red sub-pixels, green sub-pixels, and blue sub-pixels, but not limited thereto, and the color of the conversion portion included in the color conversion layer may be changed according to a requirement, for example, a yellow conversion portion and/or a white conversion portion may be selectively included. For another example, when the display device DP is a monochrome display device, the display structure layer DSL may not include a color conversion layer so that the color of the backlight is not converted, or the display structure layer DSL may include a conversion portion including one color so that the display device DP is a monochrome display device of this color.

Furthermore, the pixel structure PXS may be arranged in any suitable manner. In this embodiment, as shown in fig. 3, the pixel structures PXS may be arranged in a matrix, wherein the pixel structures PXS may be arranged in rows extending along one direction and arranged in columns extending along the other direction, and the rows in which the pixel structures PXS are arranged may be sequentially arranged along the extending direction of the columns to become a matrix. For example, in fig. 3, the pixel structures PXS are arranged in columns extending along the first direction D1, and the pixel structures PXS are arranged in rows extending along the second direction D2, but not limited thereto. In other embodiments, the pixel structures PXS are arranged in rows and columns extending along a direction different from the first direction D1 and the second direction D2, but not limited thereto.

In addition, the display device DP may also optionally include other suitable film layers, structures, or components. For example, the display device DP may further optionally include an opposite substrate, and the pixel structure PXS is disposed between the substrate SB and the opposite substrate. The display device DP may further optionally include two polarizing plates, one polarizing plate being disposed between the substrate SB and the side-entry backlight module 100, and the other polarizing plate being disposed on the opposite substrate.

Referring to fig. 4 and fig. 1 to 3 simultaneously, fig. 4 is a flowchart illustrating a picture displaying method of a display device according to an embodiment of the present invention. It should be noted that the flowchart of the screen display method of the display device DP shown in fig. 4 is exemplary, and the screen display method of the display device DP of the present invention is not limited to the flowchart and the steps shown in fig. 4.

In step ST1 of fig. 4, a plurality of original gray-scale data in the frame are obtained, wherein each original gray-scale data corresponds to one of the pixel structures PXS in the display device DP, and the number of the original gray-scale data is the same as that of the pixel structures PXS. Specifically, the display screen can be represented by the same number of original gray scale data according to the number of the pixel structures PXS of the display device DP, where the original gray scale data and the pixel structures PXS are in a one-to-one correspondence relationship, each original gray scale data is a screen gray scale value of the display screen in an area corresponding to the pixel structure PXS corresponding to the original gray scale data, and the screen gray scale value is the brightness that the light in the light emitting area of the pixel structure PXS should have when the pixel structure PXS displays the screen. In this context, the original gray scale data may be, for example, 0 to 255, wherein 0 is the minimum brightness and 255 is the maximum brightness, but not limited thereto. In addition, after the original gray scale data is obtained, the original gray scale data may be transmitted to the brightness control component 140 of the edge-type backlight module 100, and the original gray scale data may be selectively transmitted to the display driving circuit.

In step ST2 of fig. 4, at least one backlight emitting data corresponding to the edge-type backlight module 100 in the display device DP is calculated according to the original gray scale data. In step ST3 of fig. 4, the edge-type backlight module 100 emits backlight according to the backlight illumination data, wherein the light intensity of the backlight is related to the backlight illumination data. The calculation method of the backlight data may be designed according to the light source lighting control method of the edge-type backlight module 100 and/or other practical requirements, and therefore, although various calculation methods of the backlight data are described below, the calculation method of the backlight data is not limited to the method described herein. First, a first calculation method of the backlight emission data will be described below.

In the first calculation of the backlight illumination data, the brightness control component 140 can calculate a backlight illumination data according to the original gray-scale data, wherein the backlight illumination data is related to the maximum value of the original gray-scale data. Therefore, when the edge-type backlight module 100 emits the backlight according to the backlight emitting data, the intensity of the emitted backlight is related to the maximum value in the original gray scale data. That is, as the maximum value in the original gray-scale data is smaller, the light intensity of the backlight is smaller.

In addition, in the first calculation method of the backlight emission data, since only one backlight emission data is calculated, the luminance control component 140 may cause the first light emitting component 122 of the first light source 120 and the second light emitting component 132 of the second light source 130 to emit light to the light guide structure 110 according to the same backlight emission data to form backlight, and the light intensities of the light emitted by the first light emitting component 122 and the second light emitting component 132 are related to the same backlight emission data (i.e., the smaller the maximum value in the original gray scale data, the smaller the light intensities of the light emitted by the first light emitting component 122 and the second light emitting component 132). For example, the first light emitting element 122 and the second light emitting element 132 emit light rays with substantially the same light intensity, and/or the light intensity per unit area of the first light source 120 is substantially the same as the light intensity per unit area of the second light source 130, but not limited thereto. In this case, the backlight emitted by the edge-type backlight module 100 is uniform.

Optionally, in the first calculation method of the backlight illumination data (or other calculation methods described below), when each original gray-scale data is less than or equal to 50% of the maximum gray-scale data (e.g., 255) of the display device DP, that is, the required display brightness at all positions of the display screen is less than or equal to 50% of the maximum brightness that can be achieved by the pixel structure PXS, the first light source 120 is in an on state and the second light source 130 is in an off state, so that the light emitted by the first light emitting element 122 forms a backlight, or the first light source 120 is in an off state and the second light source 130 is in an on state, so that the light emitted by the second light emitting element 132 forms a backlight. In addition, in this case, the on and off states of the first light source 120 and the second light source 130 may be alternatively changed, so as to improve the service life (life time) of the edge-type backlight module 100.

Optionally, in the first calculation manner of the backlight illumination data (or other calculation manners described below), each of the first light emitting elements 122 may correspond to some of the pixel structures PXS, each of the second light emitting elements 132 may correspond to some of the pixel structures PXS, when the original gray scale data corresponding to all the pixel structures PXS corresponding to the first light emitting element 122 is 0, the first light emitting element 122 is in an off state and does not emit light, and when the original gray scale data corresponding to all the pixel structures PXS corresponding to the second light emitting element 132 is 0, the second light emitting element 132 is in an off state and does not emit light. For example, referring to fig. 3, each of the first light emitting elements 122 may respectively correspond to different consecutive three rows of pixel structures PXS in the first direction D1 (shown as pixel corresponding rows CR1, CR2, CR3, CR4, CR5, and CR6 in fig. 3), and each of the second light emitting elements 132 may respectively correspond to different consecutive three rows of pixel structures PXS in the second direction D2 (shown as pixel corresponding rows CC1, CC2, CC3, CC4, CC5, and CC6 in fig. 3). When the original gray-scale data corresponding to all the pixel structures PXS corresponding to the first light-emitting device 122 in the first direction D1 are all 0, the first light-emitting device 122 is in an off state and does not emit light; when the original gray-scale data corresponding to all the pixel structures PXS corresponding to the second light-emitting device 132 in the second direction D2 is 0, the second light-emitting device 132 is turned off and does not emit light. For example, when the original gray scale data corresponding to all the pixel structures PXS of the pixel corresponding row CR1 are all 0, the rightmost first light emitting element 122 in fig. 3 is turned off and does not emit light; when the original gray scale data corresponding to all the pixel structures PXS of the pixel corresponding row CC3 are all 0, the third second light emitting element 132 in fig. 3 is turned off and does not emit light. In this case, the contrast of the display screen can be improved. It should be noted that, the corresponding manner between the first light emitting elements 122 and the pixel structures PXS and the corresponding manner between the second light emitting elements 132 and the pixel structures PXS are not limited thereto, and may be adjusted according to the number of the first light emitting elements 122, the number of the second light emitting elements 132, the arrangement and the number of the pixel structures PXS, and other requirements.

In step ST4 of fig. 4, a plurality of display gray-scale data corresponding to the pixel structures PXS in the display device DP are calculated according to the backlight emission data and the original gray-scale data, wherein the number of the display gray-scale data is the same as that of the pixel structures PXS. In step ST5 of fig. 4, the pixel structure PXS controls the transmittance of the backlight passing through the pixel structure PXS according to the display gray scale data to display the picture. In some embodiments, the display gray scale data may be calculated in the display driving circuit and/or the brightness control component 140 of the edge-type backlight module 100, the display gray scale data and the pixel structures PXS are in a one-to-one correspondence, and each display gray scale data is calculated according to the backlight emitting data and the original gray scale data corresponding to the same pixel structure PXS. That is, each pixel structure PXS corresponds to one original gray scale data and one display gray scale data. Then, after the calculation of the display gray scale data is completed, the display driving circuit transmits the display gray scale data to the electronic components (e.g., pixel electrodes and common electrodes) in the corresponding pixel structures PXS, and the electronic components (e.g., pixel electrodes and common electrodes) in each pixel structure PXS adjust the transparency of the display medium layer according to the corresponding display gray scale data to control the transmittance of the backlight. It should be noted that the calculation method for displaying gray scale data can be any suitable method and can be adjusted according to actual requirements. Herein, the display gray scale data may be, for example, 0 to 255, wherein 0 is the minimum brightness, and 255 is the maximum brightness, but not limited thereto.

In the case of calculating the backlight emission data in the first calculation manner, each display gray scale data is calculated according to the same backlight emission data and the original gray scale data corresponding to the same pixel structure PXS. When the pixel structures PXS adjust the transparency of the display medium layer according to the corresponding display gray scale data, the lateral backlight module 100 emits backlight according to the backlight light emitting data, so that the light in the light emitting area of each pixel structure PXS has the brightness according with the corresponding original gray scale data.

For example, in the case of calculating the backlight emission data in the first calculation manner, if the maximum value of all the original gray scale data is 204, one backlight emission data may be calculated according to the original gray scale data, and the edge-type backlight module 100 generates backlight according to the backlight emission data. Regarding the generation of the backlight according to the backlight emission data, for example, when the pixel structure PXS performs the display according to the backlight, if the display gray scale data is 255, the light of the emission area of the pixel structure PXS has the brightness corresponding to the original gray scale data of 204; if the display gray scale data is 0, the light of the light emitting area of the pixel structure PXS has the brightness which is in accordance with the original gray scale data being 0; if the display gray scale data is 200, the light emitted by the light emitting area of the pixel structure PXS has a brightness (calculated according to a scale) corresponding to the original gray scale data of 160, but not limited thereto. Then, calculation (for example, referring to the above-mentioned proportional calculation method or other suitable calculation methods) may be performed according to the original gray scale data and the backlight illumination data to obtain display gray scale data, so that when the pixel structure PXS adjusts the transparency of the display medium layer according to the corresponding display gray scale data, the light of the illumination area of the pixel structure PXS has a brightness corresponding to the corresponding original gray scale data.

In addition, according to the above, since the light intensity of the backlight generated by the edge-type backlight module 100 is reduced and the light brightness of the light emitting area of the pixel structure PXS is maintained, the transparency of the display medium layer can be improved by increasing the display gray scale data, and the transmittance of the backlight can be further improved to maintain the light brightness of the light emitting area of the pixel structure PXS. In other words, according to the above calculation of the display gray scale data, the display gray scale data may be larger than the original gray scale data (i.e. the display gray scale data corresponding to one of the pixel structures PXS is larger than the original gray scale data corresponding to the pixel structure PXS) in the original gray scale data and the display gray scale data value corresponding to the same pixel structure PXS, but not limited thereto.

Therefore, the light intensity of the backlight generated by the lateral backlight module 100 of the present invention can be adjusted according to the original gray scale data, so that when the display device DP displays a low-brightness image, the image can be displayed through the backlight with a lower light intensity. In view of the above, compare in the side income formula backlight unit 100 that the tradition can not adjust the luminous intensity of being shaded, the utility model discloses a side income formula backlight unit 100 can make display device DP obtain the picture of the same or better display quality under the condition that reduces the electric energy consumption, consequently, the utility model discloses a display device DP has the effect of the energy can be saved.

The present invention provides a second calculation method of the backlight illumination data, which will be described in detail below. The luminance control component 140 may calculate a plurality of backlight emission data according to the original gray-scale data, where the plurality of backlight emission data includes at least one first backlight emission data and at least one second backlight emission data, the first light emitting component 122 emits light to the light guiding structure 110 according to the first backlight emission data, the second light emitting component 132 emits light to the light guiding structure 110 according to the second backlight emission data, and one of the first backlight emission data is different from one of the second backlight emission data. In the second calculation method of the backlight illumination data, the brightness control component 140 may calculate two backlight illumination data according to the original gray-scale data, which are a first backlight illumination data and a second backlight illumination data, respectively, all the first illumination components 122 emit light to the light guide structure 110 according to the first backlight illumination data (i.e., the light intensity of the light emitted by the first illumination components 122 is related to the first backlight illumination data), all the second illumination components 132 emit light to the light guide structure 110 according to the second backlight illumination data (i.e., the light intensity of the light emitted by the second illumination components 132 is related to the second backlight illumination data), and the first backlight illumination data and the second backlight illumination data are different from each other. In other words, the backlight illumination data calculated by the second calculation method may make the light intensity of the light emitted by the first light emitting element 122 different from the light intensity of the light emitted by the second light emitting element 132, and/or the light intensity per unit area of the first light source 120 different from the light intensity per unit area of the second light emitting element 132. It should be noted that, since the light intensities of the light rays emitted by all the first light emitting elements 122 are substantially the same as each other and the light intensities of the light rays emitted by all the second light emitting elements 132 are substantially the same as each other, the backlight emitted by the lateral backlight module 100 is still uniform.

In the case of calculating the backlight emission data in the second calculation manner, each display gray scale data is calculated from two backlight emission data (i.e., the first backlight emission data and the second backlight emission data) and the original gray scale data corresponding to the same pixel structure PXS. When the pixel structure PXS adjusts the transparency of the display medium layer according to the corresponding display gray scale data, the lateral backlight module 100 emits backlight according to the backlight light emitting data, so that the light in the light emitting area of the pixel structure PXS has the brightness according with the corresponding original gray scale data.

The present invention additionally provides a third calculation method of the backlight illumination data, which will be described in detail below. In the third calculation method of the backlight illumination data, the luminance control component 140 may calculate a plurality of backlight illumination data according to the original gray-scale data, which are respectively a plurality of first backlight illumination data and a plurality of second backlight illumination data, the first backlight illumination data and the first illumination components 122 are in one-to-one correspondence with each other (i.e., the number of the first backlight illumination data is the same as the number of the first illumination components 122), the first backlight illumination data may be the same as or different from each other, the second backlight illumination data and the second illumination components 132 are in one-to-one correspondence with each other (i.e., the number of the second backlight illumination data is the same as the number of the second illumination components 132), the second backlight illumination data may be the same as or different from each other, and at least one of the first backlight illumination data is not the same as at least one of the second backlight illumination data. In other words, the backlight illumination data calculated by the third calculation method enables the first illumination assembly 122 and the second illumination assembly 132 to operate independently, and emit light with required intensity according to the corresponding backlight illumination data. Therefore, the light intensities of the light rays emitted by the first light-emitting assemblies 122 can be the same as or different from each other, and the light intensities of the light rays emitted by the second light-emitting assemblies 132 can be the same as or different from each other, so that the backlight emitted by the edge-type backlight module 100 can be uniform or non-uniform.

In the third calculation manner of the backlight illumination data, each of the first light emitting elements 122 may correspond to some of the pixel structures PXS, and the first backlight illumination data corresponding to the first light emitting element 122 may be calculated according to the original gray scale data corresponding to the pixel structure PXS corresponding to the first light emitting element 122; each of the second light emitting elements 132 may correspond to some of the pixel structures PXS, and the second backlight illumination data corresponding to the second light emitting element 132 may be calculated according to the original gray scale data corresponding to the pixel structure PXS corresponding to the second light emitting element 132. For example, referring to fig. 3, each of the first light emitting elements 122 may respectively correspond to different consecutive three rows of pixel structures PXS in the first direction D1 (i.e., the pixel corresponding rows CR1 to CR6 of fig. 3), and may respectively calculate first backlight light emitting data according to original gray scale data corresponding to the pixel structures PXS in the pixel corresponding rows CR1 to CR6, and each of the second light emitting elements 132 may respectively correspond to different consecutive three rows of pixel structures PXS in the second direction D2 (i.e., the pixel corresponding rows CC1 to CC6 of fig. 3), and may respectively calculate second backlight light emitting data according to the original gray scale data corresponding to the pixel structures PXS in the pixel corresponding rows CC1 to CC 6.

According to the third calculation method of the backlight illumination data, the backlight received by each pixel structure PXS is provided by a first light emitting element 122 and a second light emitting element 132. For example, the backlight of the pixel structure PXS at the intersection of the pixel corresponding column CR1 and the pixel corresponding row CC1 is provided by the rightmost first light emitting element 122 and the bottommost second light emitting element 132 in fig. 3, and the backlight of the pixel structure PXS at the intersection of the pixel corresponding column CR2 and the pixel corresponding row CC4 is provided by the second first light emitting element 122 from right to left and the fourth second light emitting element 132 from bottom to top in fig. 3, but not limited thereto. Accordingly, when the lateral backlight module 100 generates backlight according to the backlight light-emitting data calculated by the third calculation method, the lateral backlight module 100 can perform regional control on the backlight intensity, so as to achieve the effects of saving electric energy and improving the contrast of the display image.

In the case of calculating the backlight emission data in the third calculation manner, each display gray scale data is calculated from two backlight emission data (i.e., the first backlight emission data and the second backlight emission data) corresponding to the same pixel structure PXS and the original gray scale data. When the pixel structure PXS adjusts the transparency of the display medium layer according to the corresponding display gray scale data, the lateral backlight module 100 emits backlight according to the backlight light emitting data, so that the light in the light emitting area of the pixel structure PXS has the brightness according with the corresponding original gray scale data.

According to the second and third calculation methods of the backlight illumination data, each of the first light-emitting elements 122 emits light to the light-guiding structure 110 according to one of the first backlight illumination data, and each of the second light-emitting elements 132 emits light to the light-guiding structure 110 according to one of the second backlight illumination data. For example, the plurality of first light emitting elements 122 may correspond to the same first backlight lighting data (i.e., the correspondence between the first light emitting elements 122 and the first backlight lighting data is many-to-one), and the plurality of second light emitting elements 132 may correspond to the same second backlight lighting data (i.e., the correspondence between the second light emitting elements 132 and the second backlight lighting data is many-to-one), such as a second calculation manner of the backlight lighting data, but not limited thereto. For example, each of the first light emitting elements 122 may correspond to different first backlight emission data (i.e., the correspondence between the first light emitting elements 122 and the first backlight emission data is one-to-one), and each of the second light emitting elements 132 may correspond to different second backlight emission data (i.e., the correspondence between the second light emitting elements 132 and the second backlight emission data is one-to-one), such as, but not limited to, a third calculation manner of the backlight emission data.

In addition, the present invention can selectively calculate the weighted gray scale data according to the distance between the pixel PXS and the light source and the original gray scale data corresponding to the pixel PXS, and the weighted gray scale data can be applied to the calculation method of the backlight illumination data, so that the backlight illumination data is calculated according to the weighted gray scale data, rather than directly calculated from the original gray scale data, but not limited thereto. In some embodiments, the weighted gray scale data may be calculated by the brightness control component 140 or other suitable calculation component.

In detail, in the calculation of the weighted gray scale data, the weight of each pixel structure PXS may be calculated according to the distance between each pixel structure PXS and the first light source 120 and the distance between each pixel structure PXS and the second light source 130. For example, each weight may include first distance information representing a distance between its pixel structure PXS and the first light source 120, and second distance information representing a distance between its pixel structure PXS and the second light source 130. In some embodiments, the first distance information of the weight may represent a distance between the pixel structure PXS thereof and the first light source 120 in the first direction D1, and the second distance information of the weight may represent a distance between the pixel structure PXS thereof and the second light source 130 in the second direction D2, but is not limited thereto.

The weighted first distance information and the weighted second distance information can be referred to fig. 5, which illustrates the light emitting device and a portion of the pixel structure PXS. As shown in fig. 5, a distance S1_1 exists between the pixel structure PXS1 and the first light source 120 (the sixth first light emitting element 122 from right to left) in the first direction D1, and a distance S2_1 exists between the pixel structure PXS1 and the second light source 130 (the sixth second light emitting element 132 from bottom to top) in the second direction D2; a distance S1_2 exists between the pixel structure PXS2 and the first light source 120 (third first light emitting element 122 from right to left) in the first direction D1, and a distance S2_2 exists between the pixel structure PXS2 and the second light source 130 (third second light emitting element 132 from bottom to top) in the second direction D2; a distance S1_3 exists between the pixel structure PXS3 and the first light source 120 (the first light emitting assembly 122 from right to left) in the first direction D1, and a distance S2_3 exists between the pixel structure PXS3 and the second light source 130 (the first second light emitting assembly 132 from bottom to top) in the second direction D2; a distance S1_4 exists between the pixel structure PXS4 and the first light source 120 (the sixth first light emitting element 122 from right to left) in the first direction D1, and a distance S2_4 exists between the pixel structure PXS4 and the second light source 130 (the first second light emitting element 132 from bottom to top) in the second direction D2. In fig. 5, since the distance S1_1 is greater than the distance S1_2 and greater than the distance S1_4 and greater than the distance S1_3, the first distance information of the pixel structure PXS1 is greater than the first distance information of the pixel structure PXS2 and greater than the first distance information of the pixel structure PXS4 and greater than the first distance information of the pixel structure PXS 3; since distance S2_4 is greater than distance S2_1 is greater than distance S2_2 is greater than distance S2_3, the second distance information for pixel structure PXS4 that is greater than the second distance information for pixel structure PXS1 is greater than the second distance information for pixel structure PXS2 is greater than the second distance information for pixel structure PXS 3. It should be noted that the weight may represent the first distance information and the second distance information separately, or the weight may be another information calculated by the first distance information and the second distance information in a specific manner.

Then, a plurality of weighted gray scale data are calculated according to the weight of each pixel structure PXS and the corresponding original gray scale data, wherein each weighted gray scale data corresponds to one of the pixel structures PXS, and the number of the weighted gray scale data is the same as that of the pixel structures PXS. The weighted gray-scale data and the pixel structure PXS are in a one-to-one correspondence, and the data range of the weighted gray-scale data can be any suitable range. For example, when the weight is calculated as another information by a specific method, each weighted gray-scale data is related to the backlight illumination data calculated subsequently (e.g., the first calculation method of the backlight illumination data described above), but not limited thereto. For example, when the weight represents the first distance information and the second distance information respectively, each weighted gray-scale data may include a first weighted gray-scale data and a second weighted gray-scale data, wherein the first weighted gray-scale data is related to a first backlight illumination data (e.g., the second calculation method or the third calculation method of the backlight illumination data) calculated subsequently, and the second weighted gray-scale data is related to a second backlight illumination data (e.g., the second calculation method or the third calculation method of the backlight illumination data) calculated subsequently, but not limited thereto.

Then, the backlight illumination data is calculated according to the weighted gray scale data, that is, the backlight intensity is influenced by the original gray scale data corresponding to the pixel structure PXS and the distance between the pixel structure PXS and the light source. In some embodiments, the backlight illumination data is associated with a maximum value of the weighted gray-scale data, but not limited thereto. For example, when the weighted gray-scale data is applied to the first calculation method of the backlight illumination data, the brightness control component 140 may calculate a backlight illumination data according to the weighted gray-scale data (i.e., in the description of the first calculation method, the original gray-scale data may be replaced by the weighted gray-scale data), but not limited thereto. For example, when the weighted gray-scale data is applied to the second calculation method of the backlight illumination data, the luminance control component 140 may calculate a first backlight illumination data and a second backlight illumination data according to the weighted gray-scale data (i.e., in the description of the second calculation method, the original gray-scale data may be replaced by the weighted gray-scale data), but not limited thereto. For example, when the weighted gray-scale data is applied to the third calculation method of the backlight illumination data, the brightness control component 140 may calculate a plurality of first backlight illumination data and a plurality of second backlight illumination data according to the weighted gray-scale data (i.e., in the description of the third calculation method, the original gray-scale data may be replaced by the weighted gray-scale data), but not limited thereto.

Generally, the light guide structure 110 includes a plurality of diffusing dots, such that after the light emitted from the light source of the edge-type backlight module 100 is incident into the light guide structure 110, the light guide structure 110 can substantially guide out the light along the third direction D3, thereby generating the backlight of the edge-type backlight module 100. In some embodiments, the density of the diffusing dots of the light guiding structure 110 is increased with the distance from the light source, so that the light intensity of the backlight generated by the edge-type backlight module 100 is more uniform. In some embodiments, when the weighted gray-scale data is applied to the calculation of the backlight illumination data, since the light intensity of the backlight is affected by the original gray-scale data corresponding to the pixel structure PXS and the distance between the pixel structure PXS and the light source, the density of the diffusing dots of the light guide structure 110 can be properly adjusted, so that the light intensity of the backlight generated by the edge-type backlight module 100 is more uniform. For example, the light guide structure 110 may include evenly distributed diffusing dots, but is not limited thereto.

The image display method of the display device DP of the present invention may further include other steps, and the steps may be performed before or after any of the above steps, or may be performed between any two of the above steps. In addition, the steps of the image display method of the display device DP described above may be adjusted or changed in the execution sequence without departing from the spirit and principles of the present invention.

The display device and the image display method thereof of the present invention are not limited to the above embodiments. Other embodiments and variations of the present invention will be further disclosed, and in order to simplify the description and make the difference between the embodiments and variations more obvious, the same components will be labeled with the same reference numerals, and repeated descriptions will not be repeated.

Referring to fig. 6, fig. 6 is an exploded view of a light guide structure and a light emitting assembly of a side-entry backlight module according to a second embodiment of the present invention. As shown in fig. 6, the difference between the present embodiment and the first embodiment lies in the structure of the side-in type backlight module 200. In the present embodiment, the light guide structure 110 of the side-in type backlight module 200 of the display device DP includes a first light guide plate 212 and a second light guide plate 214, wherein the first light guide plate 212 has a plurality of first light guide bars 212a extending along the first direction D1, the second light guide plate 214 has a plurality of second light guide bars 214a extending along the second direction D2, and the first light guide plate 212 and the second light guide plate 214 are overlapped in a third direction D3 perpendicular to the first direction D1 and the second direction D2. The first light source 120 corresponds to the first light guide plate 212 in the first direction D1, such that the first light source 120 can emit light to the first light guide strips 212a of the first light guide plate 212, and the second light source 130 corresponds to the second light guide plate 214 in the second direction D2, such that the second light source 130 can emit light to the second light guide strips 214a of the second light guide plate 214. The light emitted from the first light source 120 to the first light guide plate 212 can be distinguished by the first light guide strips 212a, and the light in different first light guide strips 212a can not be mixed in the first light guide plate 212; the light emitted from the second light source 130 to the second light guide plate 214 can be distinguished by the second light guide bars 214a, and the light in different second light guide bars 214a can not mix with each other in the second light guide plate 214. That is, if the light is emitted to one of the first light guide strips 212a, although the light is refracted and/or reflected in the first light guide strip 212a, the light is not directly emitted from the first light guide strip 212a to the other first light guide strip 212 a. For example, in fig. 6, each of the first light guide bars 212a corresponds to one of the first light emitting elements 122 in the first light source 120, and each of the second light guide bars 214a corresponds to one of the second light emitting elements 132 in the second light source 130, so that the light rays emitted by the first light emitting elements 122 corresponding to different first light guide bars 212a can be distinguished from each other by the first light guide bars 212a, and the light rays emitted by the second light emitting elements 132 corresponding to different second light guide bars 214a can be distinguished from each other by the second light guide bars 214a, but not limited thereto. Accordingly, through the design of the light guide structure 110, the calculation of the backlight illumination data and the calculation of the display gray scale data can be more accurate and easier, thereby improving the display quality.

Referring to fig. 7, fig. 7 is a schematic top view of a lateral backlight module of a display device according to a third embodiment of the present invention. As shown in fig. 7, the difference between the present embodiment and the first embodiment is the light source of the side-in type backlight module 300. In the embodiment, the first light source 120 and the second light source 130 of the edge-type backlight module 300 are strip-shaped light sources and are electrically connected to the brightness control component 140 through the routing lines 142, so that the light intensity of the first light source 120 per unit area is substantially uniform, and the light intensity of the second light source 130 per unit area is substantially uniform. In some embodiments, the light intensity per unit area of the first light source 120 is substantially the same as the light intensity per unit area of the second light source 130, but not limited thereto. In the lateral backlight module 300 of the present embodiment, the backlight emission data may be calculated by the first calculation method, the second calculation method, or other suitable methods, but not limited thereto.

Referring to fig. 8, fig. 8 is a schematic top view of a lateral backlight module of a display device according to a fourth embodiment of the present invention, wherein fig. 8 omits a trace 142 and a brightness control module 140 for clarity of the drawing. As shown in fig. 8, the difference between the present embodiment and the first embodiment is the light source of the side-in type backlight module 400. In detail, the side-in type backlight module 400 further includes a third light source 420 and a fourth light source 430, the side-in type backlight module 400 generates backlight through the first light source 120, the second light source 130, the third light source 420 and the fourth light source 430, wherein the third light source 420 is disposed adjacent to the third side 110c of the light guide structure 110 and has a plurality of third light emitting elements 422, and the fourth light source 430 is disposed adjacent to the fourth side 110d of the light guide structure 110 and has a plurality of fourth light emitting elements 432. That is, in the present embodiment, the first light source 120 and the third light source 420 are opposite to each other, and the second light source 130 and the fourth light source 430 are opposite to each other, but not limited thereto. The brightness control assembly 140 is further electrically connected to the third light emitting assembly 422 and the fourth light emitting assembly 432, and is used for controlling the light intensity of the third light emitting assembly 422 and the light intensity of the fourth light emitting assembly 432, respectively.

In some embodiments, the backlight of each pixel structure PXS is provided by the first light source 120, the second light source 130, the third light source 420 and the fourth light source 430. In some embodiments, some backlights for the pixel structures PXS are provided by the first light source 120 and the second light source 130, some backlights for the pixel structures PXS are provided by the third light source 420 and the second light source 130, some backlights for the pixel structures PXS are provided by the first light source 120 and the fourth light source 430, and some backlights for the pixel structures PXS are provided by the third light source 420 and the fourth light source 430. The light intensities of the first light emitting element 122, the second light emitting element 132, the third light emitting element 422 and the fourth light emitting element 432 can be adjusted in the following manner, for example. For example, according to the first calculation method of the backlight illumination data, the light intensities of the first light emitting element 122, the second light emitting element 132, the third light emitting element 422 and the fourth light emitting element 432 are related to one backlight illumination data, but not limited thereto. For example, according to the second calculation method or the third calculation method of the backlight illumination data, the light intensities of the first illumination element 122 and the third illumination element 422 are related to one (or one of) the first backlight illumination data, and the light intensities of the second illumination element 132 and the fourth illumination element 432 are related to one (or one of) the second backlight illumination data, but not limited thereto. For example, according to the second calculation method or the third calculation method of the backlight illumination data, the backlight illumination data further includes at least one third backlight illumination data and at least one fourth backlight illumination data, the third backlight illumination data and the fourth backlight illumination data can be calculated according to all the original gray scale data (or weighted gray scale data) or part of the original gray scale data (or weighted gray scale data) (e.g., calculating the third backlight illumination data according to the original gray scale data corresponding to the pixel structure PXS of the corresponding third light emitting component 422, calculating the fourth backlight illumination data according to the original gray scale data corresponding to the pixel structure PXS of the corresponding fourth light emitting component 432), the first light emitting component 122 is related to one (or one of) the first backlight illumination data, the light intensity of the second light emitting component 132 is related to one (or one of) the second backlight illumination data, the third light-emitting element 422 is associated with (or one of) the third backlight illumination data, and the fourth light-emitting element 432 is associated with (or one of) the fourth backlight illumination data, but not limited thereto.

To sum up, the utility model discloses a luminous intensity that the produced back light of side income formula backlight unit can be adjusted according to the original gray scale data of picture, consequently, compare in the side income formula backlight unit that the luminous intensity that the tradition can not adjust is shaded, the utility model discloses a side income formula backlight unit can make display device obtain the picture of the same or better display quality under the condition that reduces the electric energy consumption (for example promote and show picture contrast). Additionally, the utility model discloses a light emitting component that side income formula backlight unit had is far less than the straight following (direct type) backlight unit (for example, 586 light emitting component) that the tradition has regional regulation and control function, according to this, the utility model discloses a backlight unit accessible is less light emitting component and carries out regional regulation and control to the luminous intensity of being shaded to reduce the cost.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. A display device, comprising:

a side-in backlight module, comprising:

a light guide structure;

the first light source is adjacently arranged at a first side edge of the light guide structure, and the first light source is provided with a plurality of first light-emitting assemblies;

the second light source is adjacently arranged at a second side edge of the light guide structure, wherein the first side edge is adjacent to the second side edge, and the second light source is provided with a plurality of second light-emitting assemblies; and

the brightness control assembly is electrically connected with the first light-emitting assembly and the second light-emitting assembly and is used for respectively controlling the light intensity of the first light-emitting assembly and the light intensity of the second light-emitting assembly;

the substrate is arranged on the lateral entrance type backlight module; and

a plurality of pixel structures disposed on the substrate.

2. The display device of claim 1, wherein the side-entry backlight module further comprises:

the third light source is adjacently arranged at a third side edge of the light guide structure, wherein the third side edge is adjacent to the second side edge, and the third light source is provided with a plurality of third light-emitting assemblies;

a fourth light source disposed adjacent to a fourth side of the light guide structure, wherein the fourth side is adjacent to the third side, and the fourth light source has a plurality of fourth light emitting elements;

the brightness control assembly is also electrically connected with the third light-emitting assembly and the fourth light-emitting assembly, and is further used for respectively controlling the light intensity of the third light-emitting assembly and the light intensity of the fourth light-emitting assembly.

3. The display device of claim 1, wherein the light guide structure comprises:

a first light guide plate having a plurality of first light guide strips, the first light guide strips extending along a first direction, the first direction being perpendicular to the first side of the light guide structure, and each of the first light guide strips corresponding to one of the first light emitting elements in the first light source; and

a second light guide plate having a plurality of second light guide strips, the second light guide strips extending along a second direction, the second direction being perpendicular to the second side edge of the light guide structure, and each of the second light guide strips corresponding to one of the second light emitting elements in the second light source;

the first direction is not parallel to the second direction, and the first light guide plate and the second light guide plate are overlapped in a third direction perpendicular to the first direction and the second direction.

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