CN111883011A - Display module assembly and display device - Google Patents
Display module assembly and display device Download PDFInfo
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- CN111883011A CN111883011A CN202010756102.1A CN202010756102A CN111883011A CN 111883011 A CN111883011 A CN 111883011A CN 202010756102 A CN202010756102 A CN 202010756102A CN 111883011 A CN111883011 A CN 111883011A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
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- Crystallography & Structural Chemistry (AREA)
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- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The application discloses a display module and a display device, wherein the display module comprises a first display panel, a second display panel and a driving circuit; the second display panel is stacked with the first display panel; the driving circuit drives the first display panel and the second display panel to display pictures; the first display panel and the second display panel have the same resolution, and the driving circuit outputs the same data driving signal to the first display panel and the second display panel; the light emitting surfaces of the first display panel and the second display panel face to the same direction. The display contrast of the display device is improved.
Description
Technical Field
The application relates to the technical field of display, especially, relate to a display module assembly and display device.
Background
Display devices, such as liquid crystal display devices, have many advantages such as thin body, power saving, and no radiation, and are widely used. Most of the lcd devices are backlight type display devices, which include a display module (including a display panel and a backlight module). The display module has the working principle that liquid crystal molecules are placed in two parallel substrates, and driving voltage is applied to the two substrates to control the rotation direction of the liquid crystal molecules so as to refract light rays of the backlight module out to generate a picture.
However, as the quality of the liquid crystal display device is required to be higher, the conventional liquid crystal display device has a relatively low display contrast and the like, which are difficult to satisfy the requirements of some people for higher display quality.
Disclosure of Invention
The application aims at providing a display module and a display device to improve the contrast of the display device.
The application discloses a display module, which comprises a first display panel, a second display panel and a driving circuit, wherein the second display panel and the first display panel are stacked;
the driving circuit drives the first display panel and the second display panel to display pictures; the first display panel and the second display panel have the same resolution, and the driving circuit outputs the same data driving signal to the first display panel and the second display panel; the light emitting surfaces of the first display panel and the second display panel face to the same direction.
Optionally, the driving circuit includes a first source driving circuit and a second source driving circuit. The first source electrode driving circuit receives a first information source signal and outputs a first data driving signal to drive the first display panel; the second source electrode driving circuit receives a second information source signal and outputs a second data driving signal to drive the second display panel; wherein the first source signal and the second source signal are the same, and the first data driving signal and the second data driving signal are the same.
Optionally, the driving circuit includes a source driving circuit, and the source driving circuit receives the source signal and outputs a first data driving signal and a second data driving signal; the source electrode driving circuit outputs a first data driving signal to the first display panel and outputs a second data driving signal to the second display panel; wherein the first data driving signal and the second data driving signal are the same.
Optionally, the display module further includes a timing control circuit, and the timing control circuit outputs the same timing control signal to the first display panel and the second display panel.
Optionally, the display module further includes a first color filter layer and a second color filter layer, the first color filter layer is correspondingly disposed on the first display panel, and the second color filter layer is correspondingly disposed on the second display panel; the first color filter layer and the second color filter layer respectively comprise a plurality of color resistors with different colors, and the color resistors with the same color in the first color filter layer and the second color filter layer are arranged in a one-to-one correspondence mode in the direction perpendicular to the light emitting surface of the first display panel.
Optionally, the first display panel includes a first substrate, a second substrate, and a first liquid crystal layer disposed between the first substrate and the second substrate; the second display panel comprises a third substrate, a fourth substrate and a second liquid crystal layer arranged between the third substrate and the fourth substrate; wherein the first liquid crystal layer and the second liquid crystal layer have the same thickness.
Optionally, the display module further includes an upper polarizer, a lower polarizer and a middle polarizer, the upper polarizer is disposed on the first display panel, the lower polarizer is disposed on the second display panel, and the middle polarizer is disposed between the upper polarizer and the lower polarizer; the polarization directions of the upper polarizer and the lower polarizer are the same, and the polarization direction of the middle polarizer is vertical to the polarization directions of the upper polarizer and the lower polarizer.
Optionally, the display module further includes a gamma voltage generating circuit, a common voltage generating circuit, and a power conversion circuit: the gamma voltage generating circuit outputs the same gamma voltage to the first display panel and the second display panel, the common voltage generating circuit outputs the same common voltage to the first display panel and the second display panel, and the power conversion circuit outputs the same data power supply voltage to the source electrode driving circuits corresponding to the first display panel and the second display panel and outputs the same grid electrode power supply voltage to the grid electrode driving circuits corresponding to the first display panel and the second display panel.
The application also discloses a driving method of the display module, which comprises the following steps:
receiving an information source signal; and
processing according to the information source signal, and simultaneously outputting a first data driving signal, a second data driving signal and a time sequence control signal to drive a first display panel and a second display panel;
the first data driving signal is output to the first display panel, the second data driving signal is output to the second display panel, and the timing control signal is output to the first display panel and the second display panel at the same time.
The application also discloses a display device, including the application discloses the display module assembly.
For the scheme that the display module only comprises a single-layer display panel, the display module comprises a first display panel and a second display panel, and the double-layer display panel enables the ratio of the brightness of the same point on the screen of the display module when the same point is brightest (white) to the brightness of the same point when the same point is darkest (black) to be increased, so that the display contrast is greatly improved; moreover, because the first display panel and the second display panel have the same resolution ratio, and the driving circuit outputs the same data driving signal to drive the first display panel and the second display panel to display the picture, the two data driving signals do not need to carry out an extra algorithm chip to process the data driving signal and the like so as to meet the driving requirements of the display panels with different resolution ratios, the driving structure is simple, and the display contrast ratio is improved while the production cost is favorably reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic view of an exemplary display module of the present application;
FIG. 2 is a schematic view of an improved display module according to the present application;
FIG. 3 is a schematic diagram of a display device according to an embodiment of the present application;
fig. 4 is a schematic view of a display module according to an embodiment of the present application;
FIG. 5 is a schematic diagram of different source driver circuits driving different display panels according to an embodiment of the present application;
FIG. 6 is a diagram illustrating a same source driving circuit driving different display panels according to an embodiment of the present application;
FIG. 7 is a diagram of a same source COF driving different display panels according to an embodiment of the present application,
FIG. 8 is a schematic circuit block diagram of a display module according to an embodiment of the present disclosure;
FIG. 9 is a schematic view illustrating a film structure of a display module according to an embodiment of the present disclosure;
fig. 10 is a flowchart of a driving method of a display module according to an embodiment of the present disclosure.
100, a display device; 200. a display module; 201. a first display panel; 202. a second display panel; 203. a drive circuit; 204. a source driver circuit; 205. a first source drive circuit; 206. a second source driver circuit; 207. a timing control circuit; 208. a first color filter layer; 209. a second color filter layer; 210. a first substrate; 211. a first liquid crystal layer; 212. a second substrate; 213. an upper polarizer; 220. a third substrate; 221. a second liquid crystal layer; 222. a fourth substrate; 223. a lower polarizer; 224. a middle polarizer; 230. a gamma voltage generating circuit; 231. a common voltage generating circuit; 232. a power conversion circuit; 233. a gate drive circuit; 234. a memory; 235. an input connector; 240. a backlight module; 241. a source electrode flip chip film; 242. a first output binding pin; 243. a second output binding pin; 250. an upper substrate; 251. a liquid crystal layer; 252. a lower substrate; 253. a color filter layer; 254. and (4) OCA glue.
Detailed Description
It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.
Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
Fig. 1 is a schematic view of an exemplary display module according to the present application, and it can be seen from fig. 1 that the left side of the drawing is an overall structural view of the display module including only a single-layer display panel, and the right side of the drawing is a corresponding sectional view showing a specific film structure of the display module including only a single-layer display panel. Specifically, the display module 200 includes an upper polarizer 213, an upper substrate 250, a liquid crystal layer 251, a lower substrate 252 and a lower polarizer 223, wherein a color filter layer 253 is correspondingly disposed on the upper substrate 250 or the lower substrate 252, and a backlight module may be disposed on a side of the lower polarizer 223 away from the upper polarizer 213 to provide a light source. However, such a structure is inferior to a display panel such as an OLED (Organic Light-Emitting Diode) display module in characteristics such as display contrast. Therefore, the inventor improves the display structure of the display module to obtain the following improved display module.
Fig. 2 is a schematic view of an improved display module according to the present application, and it can be seen from fig. 2 that the left side of the drawing is an overall structural view of the display module including a dual-layer display panel, and the right side of the drawing is a corresponding sectional view showing a specific film structure of the display module including the dual-layer display panel. Specifically, the display module includes a first display panel 201 and a second display panel 202 stacked, where the first display panel 201 and the second display panel 202 both include an upper polarizer 213, an upper substrate 250, a Liquid crystal layer 251, a lower substrate 252 and a lower polarizer 223, the backlight module is disposed on one side of the second display panel away from the first display panel, the first display panel has a color filter layer 253 disposed on the upper substrate 250 or the lower substrate 252, and the second display panel 202 does not have the color filter layer 253, that is, the first display panel 201 is a color LCD (Liquid crystal display), and the second display panel 202 is a black and white LCD; the resolution of the first display panel 201 is greater than the resolution of the second display panel 202, specifically, the resolution of the first display panel 201 is N times the resolution of the second display panel 202, and N is greater than or equal to 2. The inventor finds that the display contrast of the improved display module is improved, but the color saturation is not obviously improved, and because the resolutions of the two display panels are different, two Timing controllers (Timing controllers) with different resolutions are required, and additional algorithm chips are required for generating data driving information and the like corresponding to the second display panel to realize the display performance of the double-layer display module, so that the driving architecture is complex, and the cost is greatly increased. Based on the above, the inventors have further improved the following solutions.
The present application is described in detail below with reference to the figures and alternative embodiments.
Fig. 3 is a schematic diagram of a display device according to an embodiment of the present disclosure, and referring to fig. 1, the present disclosure discloses a display device 100, where the display device 100 includes a display module 200 disclosed in the present disclosure.
The application discloses display module assembly as follows:
fig. 4 is a schematic diagram of a display module according to an embodiment of the present disclosure, and referring to fig. 2, the display module 200 includes a first display panel 201, a second display panel 202, and a driving circuit 203, where the second display panel 202 and the first display panel 201 are stacked. The driving circuit 203 drives the first display panel 201 and the second display panel 202 to display a picture; the first display panel 201 and the second display panel 202 have the same resolution, and the driving circuit 203 outputs the same data driving signal to the first display panel 201 and the second display panel 202; the light emitting surfaces of the first display panel 201 and the second display panel 202 face the same direction.
For the scheme that the display module only comprises a single-layer display panel, the display module 200 comprises a first display panel 201 and a second display panel 202, and the double-layer display panel enables the ratio of the brightness of the same point on the screen of the display module when the same point is brightest (white) to the brightness of the same point when the same point is darkest (black) to be increased, so that the display contrast is greatly improved; moreover, since the resolutions of the first display panel 201 and the second display panel 202 are the same, and the driving circuit 203 outputs the same data driving signal to drive the first display panel 201 and the second display panel 202 to display the image, the two data driving signals do not need to perform an additional algorithm chip to process the data driving signal and the like to satisfy the driving of the display panels with different resolutions, the driving architecture is simple, and the display contrast is improved while the production cost is reduced.
Fig. 5 is a schematic diagram of different source driving circuits driving different display panels according to an embodiment of the present application, and in combination with fig. 3 and 4, specifically, the driving circuit 203 includes: a first source driving circuit 205 and a second source driving circuit 206, wherein the first source driving circuit 205 receives a first source signal and outputs a first data driving signal to drive the first display panel 201; the second source driving circuit 206 receives a second source signal and outputs a second data driving signal to drive the second display panel 202; wherein the first source signal and the second source signal are the same, and the first data driving signal and the second data driving signal are the same. The first information source signal and the second information source signal are the same, namely the received information source signals are the same at the same time, and the first data driving signal and the second data driving signal are the same, namely the data driving signals output to the two display panels are the same at the same time; the first data driving signal receives the same information source signal and outputs the same data driving signal to drive and display the same picture, and the display contrast is improved while the display quality is improved; and because the signal source signal is the same as the data driving signal, an additional algorithm chip or circuit is not needed for processing the signal, thereby being beneficial to reducing the production cost.
Fig. 6 is a schematic diagram of the same source driving circuit driving different display panels according to an embodiment of the present application, but the source driving circuit may also be commonly used, that is, the driving circuit 203 includes a source driving circuit 204, and the source driving circuit 204 receives a source signal and outputs a first data driving signal and a second data driving signal; the source driving circuit outputs a first data driving signal to the first display panel 201 and outputs a second data driving signal to the second display panel 202; wherein the first data driving signal and the second data driving signal are the same. The source driving circuit 204 is commonly used for driving two display panels, so that the space occupation can be saved and the space utilization rate can be improved.
Fig. 7 is a schematic diagram of driving different display panels by the same source-on-chip-film according to an embodiment of the present application, and with reference to fig. 3 to 6, the common implementation of the source driving circuit may be varied, for example, the source driving circuit 204 may include at least one source-on-chip-film 241, and the source driving circuit 204 is disposed on the source-on-chip-film 241; the source chip on film 241 includes a first output bonding pin 242 and a second output bonding pin 243, the first output bonding pin 242 is bonded to the first display panel 201, and the second output bonding pin 243 is bonded to the second display panel 202. The source chip on film 241 is shared, a source driver chip is disposed on the source chip on film 241, the source driver chip can also be shared, and then the same source chip on film 241 is divided into a first output bonding pin 242 and a second output bonding pin 243 to be bonded and connected to the two display panels. The source driving chip can be two source driving chips or one source driving chip, and when only one source driving chip is arranged on one source chip on film, two groups of identical output binding pins can be arranged and divided so as to ensure the consistency of output data signals.
Another important improvement of the present application is: the display module further includes a timing control circuit 207, and the timing control circuit 207 outputs the same timing control signal to the first display panel 201 and the second display panel 202. The time sequence control signals keep consistent, the consistency of the picture display of the first display panel and the picture display of the second display panel can be guaranteed, the display contrast is improved, and the problems of disordered picture display and the like are avoided.
Specifically, the display module comprises a printed circuit board, and the printed circuit board is provided with the timing control circuit 207; the source electrode driving circuit comprises at least one first source electrode chip on film and at least one second source electrode chip on film, the first source electrode chip on film is bound and connected to a first surface of the printed circuit board close to the first display panel, the second source electrode chip on film is formed on a second surface of the printed circuit board close to the second display panel, and the first surface and the second surface are two surfaces of the printed circuit board which are arranged in a back-to-back mode. The first source electrode chip on film and the second source electrode chip on film are respectively arranged and bound on two surfaces of the printed circuit board, so that the space occupancy rate of the printed circuit board is improved, the length of wiring is reduced as much as possible, and the improvement of the space occupancy rate of the printed circuit board is facilitated, and meanwhile, the impedance loss is reduced.
Of course, the timing control circuit may include a first interface and a second interface, where the first interface outputs a first timing control signal to the first display panel, and the second interface outputs a second timing control signal to the second display panel. The setting mode of the time sequence control circuit can be diversified, and only the same time sequence control signal is output to the first display panel and the second display panel to ensure that the time sequences correspond to each other. Specifically, the timing control circuit may be disposed on a printed circuit board, and the printed circuit board may be provided with at least one first interface and at least one second interface corresponding to the timing control circuit, and is configured to be respectively bound and connected to the first display panel and the second display panel through the source electrode chip on film (of course, may also be directly or indirectly connected to the two display panels through the adapted connector), so as to implement sharing of the printed circuit board and the timing control circuit.
Fig. 8 is a schematic circuit block diagram of a display module according to an embodiment of the present application, and as shown in fig. 3 to fig. 7, the present application improves other circuits of the display module, specifically, the display module further includes a gamma voltage generating circuit 230, a common voltage generating circuit 231, and a power converting circuit 232, wherein the gamma voltage generating circuit 230 outputs the same gamma voltage to the first display panel 201 and the second display panel 202; the common voltage generating circuit 231 outputs the same common voltage to the first display panel 201 and the second display panel 202; the power conversion circuit 232 outputs the same data power supply voltage to the source driving circuits 204 corresponding to the first display panel 201 and the second display panel 202, and outputs the same gate power supply voltage to the gate driving circuits 233 corresponding to the first display panel 201 and the second display panel 202; specifically, the power conversion circuit and the common voltage circuit may be connected to the source driver circuits in the first display panel and the second display panel, and then transmit the power voltage and the like required by the gate driver circuit and the like through an additional trace or an idle pin on the source chip on film where the source driver circuit is located, or transmit the common voltage to the common line of the corresponding display panel. In addition, the display module further includes an input connector 235, a memory 234, and the like, wherein the input connector 235 is used for transmitting an externally transmitted source signal to the timing control circuit 207 and the like, and the memory 234 is used for being connected to the timing control circuit 207, the gamma voltage generating circuit, the common voltage generating circuit, and the like to help generate an adapted timing control signal, gamma voltage, common voltage, and the like; wherein, the gamma voltage generating circuit and the common voltage generating circuit can be integrated into a gamma voltage and common voltage generator; therefore, various circuits and corresponding electronic components can be shared, so that the number of independent parts of electronic components is far lower than that of the two display panels working independently, the space occupation is reduced, and the cost is reduced; the power conversion circuit more specifically comprises a direct current to direct current conversion circuit.
Fig. 9 is a schematic view of a film structure of a display module according to an embodiment of the present application, and with reference to fig. 3 to 8, a left drawing in the drawing is an overall structure view of the display module including a dual-layer display panel, and a right drawing in the drawing is a corresponding screenshot view showing a specific film structure of the display module including the dual-layer display panel. Specifically, the circuit is improved, and the film structure of the display module is also improved, in the application, the first display panel 201 and the second display panel 202 are fixed by bonding with an OCA (optical Clear Adhesive) glue 254; the first display panel 201 sequentially includes, from top to bottom, a first substrate 210, a second substrate 212, and a first liquid crystal layer 211 disposed between the first substrate 210 and the second substrate 212; the second display panel 202 sequentially includes, from top to bottom, a third substrate 220, a fourth substrate 222, and a second liquid crystal layer 221 disposed between the third substrate 220 and the fourth substrate 222; wherein, the thicknesses of the first liquid crystal layer 211 and the second liquid crystal layer 221 are the same. That is, the first liquid crystal layer and the second liquid crystal layer have the same thickness under the same other conditions (e.g., materials, etc.), so that the first liquid crystal layer and the second liquid crystal layer have the same transmittance. The OCA glue 254 is disposed between the second substrate 212 and the third substrate 220 to bond and fix the second substrate 212 and the third substrate 220.
In order to enable the first display panel 201 and the second display panel 202 to display the same picture, the display module further comprises a first color filter layer 208 and a second color filter layer 209, wherein the first color filter layer 208 is correspondingly arranged on the first display panel 201, and the second color filter layer 209 is correspondingly arranged on the second display panel 202; the first color filter layer 208 and the second color filter layer 209 respectively include a plurality of color resistors with different colors, and the color resistors with the same color in the first color filter layer 208 and the second color filter layer 209 are arranged in a one-to-one correspondence manner in a direction perpendicular to the light emitting surface of the first display panel 201. The overlapping arrangement of the double-layer color filter layers is not only beneficial to improving the display contrast, but also beneficial to improving the color saturation of the display module as the total thickness of the color filter layers is increased, the filtering capability is enhanced, and the corresponding light spectrum is narrowed due to the overlapping of the double-layer color filter layers; moreover, the arrangement of the two color filter layers can avoid the problems that the manufacturing process is not allowed or the yield is too low when the color filter layer is singly thickened to double the thickness; the first color filter layer and the second color filter layer may be disposed in the first display panel or the second display panel, and more specifically, the first color filter layer and the second color filter layer may be disposed on both surfaces of the first substrate close to and far from the second substrate, taking the first display panel as an example.
Specifically, the first color filter layer includes a plurality of first red color resistors, a plurality of first green color resistors, and a plurality of first blue color resistors, the second color filter layer includes a plurality of second red color resistors, a plurality of second green color resistors, and a plurality of second blue color resistors, and the plurality of first red color resistors and the plurality of second red color resistors have the same thickness and are arranged in a one-to-one correspondence in a direction perpendicular to the light exit surface of the first display panel; the first green color resistances and the second green color resistances are arranged in a one-to-one correspondence manner in the direction perpendicular to the light emitting surface of the first display panel; the first blue color resistors and the second blue color resistors have the same thickness and are arranged in a one-to-one correspondence mode in the direction perpendicular to the light emitting surface of the first display panel. Namely, the first color filter layer and the second color filter layer have the same thickness and are arranged in one-to-one correspondence on the basis of the completely same other conditions (including materials and the like). The color resistors included in the first color filter layer and the second color filter layer of the present application may be RGB color resistors (red, green, blue color resistors), RGBW color resistors (red, green, blue, white color resistors), RGBY color resistors (red, green, blue, yellow color resistors), or color resistors of other colors, as long as the application is applicable.
The display module further includes an upper polarizer 213, a lower polarizer 223 and a middle polarizer 224, the upper polarizer 213 is disposed on the first display panel 201, the lower polarizer 223 is disposed on the second display panel 202, and the middle polarizer 224 is disposed between the upper polarizer 213 and the lower polarizer 223. The polarization directions of the upper polarizer 213 and the lower polarizer 223 are the same, and the middle polarizer 224 is perpendicular to the polarization directions of the upper polarizer 213 and the lower polarizer 223. The upper polarizer 213 may be disposed on the first substrate 210, the lower polarizer 223 is disposed on the fourth substrate 222, and the middle polarizer 224 may be disposed on the second substrate 212 or the third substrate 220, and more specifically, may be disposed on a side of the second substrate 212 close to the third substrate 220 or a side of the third substrate 220 close to the second substrate 212. The three polaroids are arranged, the middle polaroid can be shared, the using number of the polaroids is reduced, and the reasonable matching of the three polaroids is favorable for improving the contrast and the color saturation.
Referring to fig. 3 to 9, the present application further discloses a display module 200, which includes a first display panel 201, a second display panel 202, a backlight module 240, a source chip on film 241 and a timing control circuit 207, wherein the second display panel 202 and the first display panel 201 are stacked, and the first display panel 201 and the second display panel 202 have the same resolution. The second display panel 202 is disposed between the first display panel 201 and the backlight module 240, a plurality of source flip-chip films 241 are disposed, each source flip-chip film 241 includes a first output bonding pin 242 and a second output bonding pin 243, the first output bonding pin 242 is bonded to the first display panel 201, and the second output bonding pin 243 is bonded to the second display panel 202; the first and second output bonding pins 242 and 243 output the same data driving signal to the first and second display panels 201 and 202. The timing control circuit 207 outputs the same timing control signal to the first display panel 201 and the second display panel 202. The display module 200 further includes a first color filter layer 208 and a second color filter layer 209, wherein the first color filter layer 208 is correspondingly disposed on the first display panel 201, and the second color filter layer 209 is correspondingly disposed on the second display panel 202; the first color filter layer 208 and the second color filter layer 209 respectively include a plurality of color resistors with different colors, and the color resistors with the same color in the first color filter layer 208 and the second color filter layer 209 are arranged in a one-to-one correspondence manner in a direction perpendicular to the light emitting surface of the first display panel 201. This scheme except can improving the demonstration contrast, promotes the color saturation, can also realize backlight unit's sharing, practices thrift the space and occupies, and reduces the consumption.
Fig. 10 is a flowchart of a driving method of a display module according to an embodiment of the present application, and with reference to fig. 3 to 9, the present application further discloses a driving method of a display module, including:
s1: receiving an information source signal;
s2: processing according to the information source signal, and simultaneously outputting a first data driving signal, a second data driving signal and a time sequence control signal to drive a first display panel and a second display panel;
the first data driving signal is output to the first display panel, the second data driving signal is output to the second display panel, and the timing control signal is output to the first display panel and the second display panel at the same time.
It should be noted that, on the premise of not affecting the implementation of the specific embodiment, the limitations of the steps involved in the present solution are not considered to limit the order of the steps, and the steps written in the foregoing may be executed first, or executed later, or even executed simultaneously; in the same way, the technical features involved in the scheme can be combined and applied under the condition that no conflict is wanted. The present invention should be considered as falling within the scope of the present application as long as the present solution can be implemented.
The technical scheme of the application can be widely applied to various display modules, such as TN (Twisted Nematic) display module, IPS (In-Plane Switching) display module, VA (Vertical Alignment) display module, MVA (Multi-Domain Vertical Alignment) display module, and of course, other types of display modules can be used, and the scheme can be applied to the display modules.
The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.
Claims (10)
1. A display module, comprising:
a first display panel;
a second display panel stacked with the first display panel; and
the driving circuit drives the first display panel and the second display panel to display pictures;
the first display panel and the second display panel have the same resolution, and the driving circuit outputs the same data driving signal to the first display panel and the second display panel; the light emitting surfaces of the first display panel and the second display panel face to the same direction.
2. The display module according to claim 1, wherein the driving circuit comprises:
the first source electrode driving circuit receives a first information source signal and outputs a first data driving signal to drive the first display panel; and
the second source electrode driving circuit receives a second information source signal and outputs a second data driving signal to drive the second display panel;
wherein the first source signal and the second source signal are the same, and the first data driving signal and the second data driving signal are the same.
3. The display module according to claim 1, wherein the driving circuit comprises:
the source electrode driving circuit receives the information source signal and outputs a first data driving signal and a second data driving signal; the source electrode driving circuit outputs a first data driving signal to the first display panel and outputs a second data driving signal to the second display panel;
wherein the first data driving signal and the second data driving signal are the same.
4. A display module according to any one of claims 1 to 3, wherein the display module further comprises:
and the time sequence control circuit outputs the same time sequence control signal to the first display panel and the second display panel.
5. The display module of claim 4, wherein the display module further comprises:
a gamma voltage generating circuit outputting the same gamma voltage to the first display panel and the second display panel;
a common voltage generating circuit outputting the same common voltage to the first display panel and the second display panel; and
and the power supply conversion circuit outputs the same data power supply voltage to the source electrode driving circuits corresponding to the first display panel and the second display panel and outputs the same grid electrode power supply voltage to the grid electrode driving circuits corresponding to the first display panel and the second display panel.
6. The display module of claim 1, wherein the display module further comprises:
the first color filter layer is correspondingly arranged on the first display panel;
the second color filter layer is correspondingly arranged on the second display panel;
the first color filter layer and the second color filter layer respectively comprise a plurality of color resistors with different colors, and the color resistors with the same color in the first color filter layer and the second color filter layer are arranged in a one-to-one correspondence mode in the direction perpendicular to the light emitting surface of the first display panel.
7. The display module according to claim 1, wherein the first display panel comprises a first substrate, a second substrate, and a first liquid crystal layer disposed between the first substrate and the second substrate; the second display panel comprises a third substrate, a fourth substrate and a second liquid crystal layer arranged between the third substrate and the fourth substrate;
wherein the first liquid crystal layer and the second liquid crystal layer have the same thickness.
8. The display module of claim 1, wherein the display module further comprises:
an upper polarizer disposed on the first display panel;
a lower polarizer disposed on the second display panel; and
the middle polarizer is arranged between the upper polarizer and the lower polarizer;
the polarization directions of the upper polarizer and the lower polarizer are the same, and the polarization direction of the middle polarizer is vertical to the polarization directions of the upper polarizer and the lower polarizer.
9. A driving method of a display module is characterized by comprising the following steps:
receiving an information source signal; and
processing according to the information source signal, and simultaneously outputting a first data driving signal, a second data driving signal and a time sequence control signal to drive a first display panel and a second display panel;
the first data driving signal is output to the first display panel, the second data driving signal is output to the second display panel, and the timing control signal is output to the first display panel and the second display panel at the same time.
10. A display device, comprising the display module according to any one of claims 1 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010756102.1A CN111883011A (en) | 2020-07-31 | 2020-07-31 | Display module assembly and display device |
| US17/340,078 US11488559B2 (en) | 2020-07-31 | 2021-06-06 | Display assembly including a first display panel and a second display panel stacked over the first display panel for improving a contrast ratio, and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010756102.1A CN111883011A (en) | 2020-07-31 | 2020-07-31 | Display module assembly and display device |
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| CN111883011A true CN111883011A (en) | 2020-11-03 |
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| CN114822401A (en) * | 2022-06-30 | 2022-07-29 | 惠科股份有限公司 | Display device, source electrode chip on film and driving method |
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