LCD and OLED composite display screen and preparation method thereof

By superimposing an OLED cell on an LCD cell, a composite LCD-OLED display screen that can switch between static and dynamic display modes is constructed, solving the problem of reducing costs while ensuring display quality for automotive and industrial control displays, and achieving a balance between image quality improvement and energy consumption.

CN120853469APending Publication Date: 2025-10-28JIANGMEN YEEBO SEMICON
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Patent Information

Application Number
CN202511173310.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-21
Publication Date
2025-10-28

AI Technical Summary

Technical Problem

In automotive and industrial control displays, how can we reduce costs while ensuring display quality? In particular, how can we use LCD for static displays to reduce costs and OLED for dynamic displays to improve image quality without increasing the overall cost?

Method used

Design an LCD/OLED composite display screen. By partially superimposing OLED cells on an LCD cell, a static and dynamic display mode switching can be achieved. In static display, only the LCD works, while in dynamic display, both the LCD and OLED work simultaneously. Combining MVALCD and AMOLED technologies, image quality can be improved and costs can be controlled.

Benefits of technology

It achieves the goal of improving the image quality of dynamic display areas while ensuring the stability and economy of LCDs, reducing overall costs, and breaking through the display bottleneck of traditional LCDs in key dynamic display areas, thus achieving a balance between energy consumption and display effect.

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Abstract

The invention discloses an LCD and OLED composite display screen and a preparation method thereof, the LCD and OLED composite display screen comprises an LCD box, the LCD box is provided with a display area and a non-display area, and the display area of the LCD box forms a static display area; the OLED box is arranged on the back surface of the LCD box and is opposite to the non-display area to form a dynamic display area; the static display driver I C is electrically connected with the LCD box; and the dynamic display driver I C is electrically connected with the OLED box. According to the composite display screen, the LCD box and the OLED box are innovatively compounded, a solution with the cost advantage and high-performance display is constructed, the stability and economical efficiency of the LCD are reserved, the image quality performance of a core dynamic display area is locally improved through the OLED, and an innovative display framework with complementary functions, controllable cost and upgraded experience is formed.
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Description

Technical Field

[0001] This invention relates to the technical field of display screens, and in particular to an LCD / OLED composite display screen and its manufacturing method. Background Technology

[0002] Currently, displays on the market are mainly divided into two categories: LCD (Liquid Crystal Display) and OLED (Organic Light Emitting Diode Display). LCD has the advantages of low cost and long lifespan, but its color saturation and contrast are relatively low; while OLED has advantages such as high color saturation, high contrast and low power consumption, but its cost is relatively high. In displays used in automotive, industrial control and other fields, there are parts that maintain static display and parts that require dynamic display. Static display is preferably made of LCD, while dynamic display is preferably made of OLED. Therefore, how to reduce costs while ensuring display quality has become an urgent problem to be solved in the current display technology field. Summary of the Invention

[0003] To overcome the above-mentioned technical defects, the present invention provides an LCD and OLED composite display screen and its preparation method, which aims to solve the problems in the background art.

[0004] This invention is implemented according to the following technical solution:

[0005] This invention discloses an LCD / OLED composite display screen, comprising:

[0006] An LCD cell has a display area and a non-display area. The display area of ​​the LCD cell constitutes a static display area, and the non-display area of ​​the LCD cell has a light-transmitting function.

[0007] An OLED cell is disposed on the back of the LCD cell and opposite to the non-display area, forming a dynamic display area;

[0008] A static display driver IC, which is electrically connected to the LCD cell;

[0009] A dynamic display driver IC, which is electrically connected to the OLED cell;

[0010] Under the drive of the static display driver IC and the dynamic display driver IC, the LCD and OLED composite display screen has a static display mode and a dynamic display mode; when the LCD and OLED composite screen is in the static display mode, the LCD cell is working and the OLED cell is not working; when the LCD and OLED composite screen is in the dynamic display mode, both the LCD cell and the OLED cell are working.

[0011] In a preferred embodiment, the non-display area and the dynamic display area have completely overlapping shapes.

[0012] In a preferred embodiment, the LCD cell and the OLED cell are bonded together by optical adhesive.

[0013] In a preferred embodiment, the LCD cell is an MVA LCD cell.

[0014] In a preferred embodiment, the OLED cell is an AMOLED cell.

[0015] In a preferred embodiment, the LCD and OLED composite display screen further includes a surface polarizer disposed in front of the LCD cell.

[0016] In a preferred embodiment, the LCD and OLED composite display screen further includes a bottom polarizer, which is disposed on the back of the LCD cell and covers only the display area of ​​the LCD cell, without covering the non-display area of ​​the LCD cell.

[0017] In a preferred embodiment, the bottom polarizer has a cut-out area, the shape of which matches the shape of the OLED cell.

[0018] The present invention also provides a method for fabricating an LCD / OLED composite display screen, which is used to fabricate the LCD / OLED composite display screen as described above. The method for fabricating the LCD / OLED composite display screen includes the following steps:

[0019] (1) Provide an LCD box, and when the pattern of the LCD box is made, the conductive layer in the preset area inside the LCD box is completely etched so that the preset area forms a non-display area;

[0020] (2) Provide an OLED box, install the OLED box on the back of the LCD box and face the non-display area, and fully bond the LCD box and the OLED box together with OCA optical adhesive.

[0021] (3) Provide a bottom polarizer with through holes corresponding to a preset area, and attach it to the back of the LCD cell.

[0022] (4) Provide a static driver IC and a dynamic driver IC, electrically connect the static driver IC to the LCD cell, and electrically connect the dynamic driver IC to the OLED cell.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] This composite display innovatively combines an LCD cell and an OLED cell to create a solution that combines cost advantages with high-performance display. This solution retains the stability and economy of LCD while enhancing the image quality of core dynamic display areas through OLED, forming an innovative display architecture that is functionally complementary, cost-controllable, and provides an upgraded user experience. First, by using a design that partially overlays an OLED cell onto the LCD cell, the image from the OLED cell can pass through the non-display area of ​​the translucent LCD cell, significantly reducing costs compared to a full-size OLED cell, while also extending the overall lifespan by leveraging the long lifespan of the LCD cell. Second, the high color saturation and high contrast characteristics of the OLED cell are introduced into critical dynamic display areas related to overall device safety and usage warnings, breaking through the display bottlenecks of traditional LCD cells and achieving visual enhancement of key content. Third, in static scenes, only the low-power LCD cell is used to ensure basic display; when dynamic demands arise, the OLED cell's dynamic display is activated on top of the static display of the LCD cell, achieving a balance between energy consumption and display effect. Attached Figure Description

[0025] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is a cross-sectional schematic diagram of the LCD and OLED composite display screen of the present invention;

[0027] Figure 2 This is a top view schematic diagram of the LCD and OLED composite display screen of the present invention;

[0028] Figure 3 This is a bottom view schematic diagram of the LCD and OLED composite display screen of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-LCD box, 11-Display area, 12-Non-display area, 2-OLED box, 3-Surface polarizer, 4-Bottom polarizer. Detailed Implementation

[0031] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0032] To better illustrate the present invention, the invention will now be described in further detail with reference to the accompanying drawings.

[0033] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0034] Combination Figures 1 to 3 As shown, this invention discloses an LCD / OLED composite display screen, comprising:

[0035] LCD cell 1 has a display area 11 and a non-display area 12. The display area 11 of the LCD cell constitutes a static display area, and the non-display area 12 of the LCD cell has a light-transmitting function.

[0036] OLED cell 2 is disposed on the back of LCD cell 1 and opposite to the non-display area 12, forming a dynamic display area;

[0037] A static display driver IC, which is electrically connected to the LCD cell;

[0038] A dynamic display driver IC, which is electrically connected to the OLED cell;

[0039] Under the drive of the static display driver IC and the dynamic display driver IC, the LCD and OLED composite display screen has a static display mode and a dynamic display mode; when the LCD and OLED composite screen is in the static display mode, the LCD cell is working and the OLED cell is not working; when the LCD and OLED composite screen is in the dynamic display mode, both the LCD cell and the OLED cell are working.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0041] This composite display screen innovatively combines an LCD cell and an OLED cell to construct a solution with both cost advantages and high-performance display. This solution not only retains the stability and economy of the LCD, but also locally enhances the image quality performance of the core dynamic display area through the OLED, forming an innovative display architecture with complementary functions, controllable costs, and upgraded experience. First, a design of locally superimposing the OLED cell on the LCD cell is adopted. The picture of the OLED cell can pass through the non-display area 12 of the light-transmitting LCD cell so that viewers can see it, significantly reducing costs compared with a full-size OLED cell, and at the same time extending the overall service life relying on the long service life characteristics of the LCD cell; Second, the high color saturation and high contrast characteristics of the OLED cell are introduced in the key dynamic display areas related to the safety of the whole machine and warning reminders for use, breaking through the display bottleneck of the traditional LCD cell and achieving visual enhancement of key content; Third, only the low-power LCD cell is enabled to ensure basic display in the static picture. When there is a dynamic demand, based on the static display of the LCD cell, the dynamic display of the OLED cell is activated to achieve a balance between energy consumption and display effect.

[0042] It should be noted that the display driver IC is the core component of the display screen imaging system and belongs to the prior art. It is mainly used to drive the display and control the driving current. Its functions cover two modes: static driving and dynamic driving, and it is widely used in monochrome, two-color and full-color display screens in fields such as telecommunications, finance, and transportation.

[0043] In one embodiment, the non-display area completely coincides with the dynamic display area. The complete coincidence of the OLED dynamic display area and the LCD non-display area allows the picture content to be accurately mapped to the corresponding area, avoiding misalignment or black edges caused by the size difference between the two, and enhancing the visual consistency of the dual-screen linkage display.

[0044] In one embodiment, the LCD cell and the OLED cell are adhesively bonded together through an optical adhesive. As a gapless and highly ductile bonding medium, the optical adhesive can achieve the close bonding of the LCD cell and the OLED cell. With the high light-transmitting characteristics of the optical adhesive, the connection between the LCD cell and the OLED cell is more natural, significantly improving the overall light transmittance and picture clarity of the screen.

[0045] In one embodiment, the LCD cell is an MVA LCD cell. MVA (Multi-domain Vertical Alignment) LCD cells, through a multi-domain liquid crystal molecule arrangement design within pixels, overcome the viewing angle limitations of traditional VA screens, achieving an ultra-wide viewing angle of nearly 180°. Even at wide viewing angles, they maintain color accuracy and brightness uniformity, avoiding color shift or brightness attenuation problems caused by viewing angle deviation in traditional LCDs, thus improving the multi-user scenario adaptability of the composite display screen. Inheriting the inherent advantages of vertically aligned liquid crystals in VA technology, MVA LCDs can achieve near-pure black display effects in dark conditions, complementing the high contrast characteristics of OLEDs and further optimizing the overall brightness and darkness gradation of the composite display screen.

[0046] In static mode, the high contrast and low power consumption of MVA LCD ensure basic display quality; in dynamic mode, the fast response capability of MVA LCD complements the high refresh rate of OLED, achieving a seamless transition when displaying two screens simultaneously, avoiding screen tearing or stuttering.

[0047] In one embodiment, the OLED cell is an AMOLED cell. Employing AMOLED (Active Matrix Organic Light Emitting Diode) technology, it integrates an independent thin-film transistor (TFT) for each pixel, enabling precise current control of the OLED pixels. This significantly improves display accuracy and grayscale performance, resulting in smoother dynamic image transitions and richer detail in dark areas. Leveraging the self-emissive characteristics and pixel-level switching capabilities of AMOLED, inactive pixels can be completely shut off, achieving theoretically unlimited dynamic contrast and near-pure black effects. Combined with the high contrast characteristics of MVALCD, this further enhances the sense of brightness and darkness and depth of field in the composite display screen.

[0048] In one embodiment, the LCD / OLED composite display screen further includes a surface polarizer 3, which is disposed in front of the LCD cell. Since the OLED cell is located on the back of the LCD cell, the OLED cell and the LCD cell can share the same surface polarizer 3. By sharing a single surface polarizer 3, the dual display requirements of LCD and OLED can be met, eliminating the redundant structure of traditional dual-screen independent polarizer configuration, and reducing material usage and assembly processes.

[0049] In one embodiment, the LCD and OLED composite display screen further includes a bottom polarizer 4, which is disposed on the back of the LCD cell and covers only the display area 11 of the LCD cell, without covering the non-display area 12 of the LCD cell.

[0050] The bottom polarizer 4 only covers the display area 11 of the LCD cell. Through the directional polarization filtering function of the bottom polarizer 4, the light emitted by the backlight required by the LCD is strictly limited to the effective display area 11, eliminating stray light overflow from the non-display area 12, significantly improving dark performance and overall contrast, especially in night or low-light environments, it can present a purer black background.

[0051] It should be noted that the backlight is located on the back of the LCD cell, which requires a backlight to display, while the OLED cell is self-illuminating and can display without a backlight.

[0052] Since the bottom polarizer 4 does not cover the non-display functional area of ​​the LCD (i.e., the area opposite to the OLED), it avoids interference with the self-emissive path of the OLED cell, ensuring that the OLED cell does not need to penetrate the polarizer during display, thus fully retaining its high contrast and wide color gamut advantages, and avoiding optical interference from the bottom polarizer 4 to the self-emissive of the OLED cell.

[0053] Furthermore, the bottom polarizer 4 has a cut-out area, the shape of which matches the shape of the OLED cell. The cut-out area of ​​the bottom polarizer 4 precisely matches the shape of the OLED cell, completely avoiding the self-emissive path of the OLED cell.

[0054] The present invention also provides a method for fabricating an LCD / OLED composite display screen, which is used to fabricate the LCD / OLED composite display screen as described above. The method for fabricating the LCD / OLED composite display screen includes the following steps:

[0055] (1) Provide an LCD box, and when the pattern of the LCD box is made, the conductive layer in the preset area inside the LCD box is completely etched so that the preset area forms a non-display area 12.

[0056] (2) Provide an OLED box, install the OLED box on the back of the LCD box and face the non-display area 12, and fully bond the LCD box and the OLED box together with OCA optical adhesive.

[0057] (3) A bottom polarizer 4 is provided, with through holes corresponding to a preset area cut out in the bottom polarizer 4, and attached to the back of the LCD cell.

[0058] (4) Provide a static driver IC and a dynamic driver IC, electrically connect the static driver IC to the LCD cell, and electrically connect the dynamic driver IC to the OLED cell.

[0059] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A composite LCD and OLED display screen, characterized in that, include: An LCD cell has a display area and a non-display area. The display area of ​​the LCD cell constitutes a static display area, and the non-display area of ​​the LCD cell has a light-transmitting function. An OLED cell is disposed on the back of the LCD cell and opposite to the non-display area, forming a dynamic display area; A static display driver IC, which is electrically connected to the LCD cell; A dynamic display driver IC, which is electrically connected to the OLED cell; Under the drive of the static display driver IC and the dynamic display driver IC, the LCD and OLED composite display screen has a static display mode and a dynamic display mode; when the LCD and OLED composite screen is in the static display mode, the LCD cell is working and the OLED cell is not working; when the LCD and OLED composite screen is in the dynamic display mode, both the LCD cell and the OLED cell are working.

2. The LCD and OLED composite display screen according to claim 1, characterized in that: The non-display area and the dynamic display area have completely overlapping shapes.

3. The LCD and OLED composite display screen according to claim 1, characterized in that: The LCD cell and the OLED cell are bonded together with optical adhesive.

4. The LCD and OLED composite display screen according to claim 1, characterized in that: The LCD cell is an MVA LCD cell.

5. The LCD and OLED composite display screen according to claim 1 or 4, characterized in that: The OLED box is an AMOLED box.

6. The LCD and OLED composite display screen according to claim 1, characterized in that: The LCD and OLED composite display screen also includes a surface polarizer, which is disposed in front of the LCD cell.

7. The LCD and OLED composite display screen according to claim 1, characterized in that: The LCD and OLED composite display screen also includes a bottom polarizer, which is disposed on the back of the LCD cell and only covers the display area of ​​the LCD cell, without covering the non-display area of ​​the LCD cell.

8. The LCD and OLED composite display screen according to claim 7, characterized in that: The bottom polarizer has a cut-out area, the shape of which matches the shape of the OLED cell.

9. A method for manufacturing an LCD / OLED composite display screen, characterized in that, The method for fabricating an LCD / OLED composite display screen as described in any one of claims 1-8 includes the following steps: (1) Provide an LCD box, and when the pattern of the LCD box is made, the conductive layer in the preset area inside the LCD box is completely etched so that the preset area forms a non-display area; (2) Provide an OLED box, install the OLED box on the back of the LCD box and face the non-display area, and fully bond the LCD box and the OLED box together with OCA optical adhesive. (3) Provide a bottom polarizer with through holes corresponding to a preset area, and attach it to the back of the LCD cell. (4) Provide a static driver IC and a dynamic driver IC, electrically connect the static driver IC to the LCD cell, and electrically connect the dynamic driver IC to the OLED cell.