Table of Contents
HCQS HO3 3D In-Cell Touch LCD Report – An Excellent Alternative
1. TECHNOLOGY DESCRIPTION
1.1. Out-Cell Touch Technology
1.2. In-Cell Touch Technology
1.3. HO3 3D In-Cell Touch Technology
2.FEATURES & BENEFITS – Lighter! Faster! Brighter
3.SPECIFICATION (iPhone 6S Plus HO3 LCD Assembly)
3.1. LCD Mechanical Dimensions
3.2. Function Tests
3.3. LCD Structure
1. TECHNOLOGY DESCRIPTION
Touchscreen performance and efficiency remain key differentiators in smartphones. The choice of its design is a critical factor in a product’s ultimate success.
Let us first take a look at current touch and display integration technologies for iPhone, and then have a view of a new and innovative solution – HO3 3D In-Cell Touch that HCQS exclusively developed for iPhone.
1.1.Out-Cell Touch Technology
It has been common to add the touch sensors as a separate or discrete overlay atop the display in a laminated panel stack-up (These designs are called “discrete” to emphasize the fact that the touch function exists separately as an overlay on the display.). With this design, the sensors are added either on a glass or in a dedicated sensor layer.
Designs with a separate sensor layer are known as Out-Cell Touch Technology, such as Glass-Glass (GG) and Glass-Film-Film(GFF), depending on whether the transmitting and receiving touch functions are implemented in one or two layers, respectively, of the sensor film or sensor glass.
Out-Cell Touch is a handy alternative for iPhone display replacement and has the proven low-risk advantages with short time-to-market and good price. It also has obvious disadvantages, however, such as making the panel stack-up thicker, dimmer, and slower.
1.2.In-Cell Touch Technology
Integrates the touch sensors directly into one or more layers in the display stack-up itself.
In-Cell technology removes the touch sensor substrate, by combining the liquid crystal and touch sensing elements into a single structure (The term Full In-Cell means that the transmitting and receiving touch sensor layers are both within the cell). Apple started implementing In-Cell Touch with iPhone 5 in 2012.
In-cell display technology combines the touch sensor layer and LCD cell into a single layer, allowing devices to be thinner and lighter.
1.3.HO3 3D In-Cell Touch Technology
3D, Display and Touch Integration
The new LCD panel incorporating the “HO3 3D In-Cell Touch” function is an exclusive development by HCQS, which combines the liquid crystal, touch sensing elements and 3D touch capacitive sensors into a single structure (3D Touch is a more sensitive version of Force Touch developed and introduced by Apple Inc. in 2015 and has been utilized in iPhone 6S and later models.).
HO3 3D In-Cell Touch reduces the thickness of the display panel by integrating the LCD, the touchscreen layer and the 3D capacitive sensor layer into a single unit, rather than stacking the three layers on top of one another. As a result, it reduces the panel’s thickness and weight, featuring an excellent touch response and precise calibration of the touch point.
Integrated Driver Controller IC (IDC)
Different from traditional multi-chip solutions, HO3 3D In-Cell Touch requires only one Integrated Driver Controller IC (IDC) to drive display, touch and 3D touch functions.
IDC solution features narrow module design and high signal-to-noise ratio. As a result, it maximizes touch accuracy and sensitivity performance at ultra-low power consumption – an excellent alternative display for iPhone.
Superb Touch Sensitivity
HCQS HO3 3D In-Cell Touch LCD has superb touch performance. The thinner panel makes touch feedback more accurate and ensures outstanding response when the screen is touched by fingers.
Compared with external sensors, HCQS HO3 3D In-Cell Touch LCD provides very good picture quality with high transmittance and low reflectivity. A thinner distance from the backlight to the display surface increases the brightness and color reproduction of the display.
Low Power Consumption
Without a shield from a discrete touch module, reduce the reflection and refraction, the LCD display is more penetrating and more power-effective.
Advanced IDC Features
HO3 3D In-Cell Touch LCD requires only one Integrated Driver Controller IC (IDC) to perform display, touch and 3D touch functions simultaneously, enhancing power efficiency, brightness, color and contrast
Overall width (75.38mm)
Screen size (5.5-inch, diagonal)
HO3 sample screen fits very well on iPhone 6S Plus housing.
Polarizer Test – Film
The polarizer test comparison between 3D In-Cell (HO3) screen and OEM screen indicates outstanding visibility with HO3 screen. There is no obvious difference between HO3 screen and OEM one in the test.
Polarizer Test – Sunglasses
Polarizer sunglasses test with HO3 LCD suggests extraordinary image performance even when you are wearing sunglasses.
Hydrophobic Effect Comparison
OEM screen has the best hydrophobicity, followed by 3D In-Cell (HO3) screen and ordinary China made replacement. The liquid on screens is water.
Display Test – Backlight Test
HO3 LCD has no issues of back light leakage and shadow.
Display Test – Color Temperature, Display Color
Display Test – HO3 at different viewing angels
There are no obvious color changes from different angles. HO3 screen always keeps the same color.
Power Consumption Test
HO3 3D In-Cell Touch LCD is more power-efficient under 2-hour power consumption test.
Top Polarizer: Top Polarizing filter film with a vertical axis to horizontally polarize light as it enters. The function of the polarizer is to improve color and definition, making it possible to see the screens of LCDs.
Top Glass Substrate: Special glass substrate with ITO electrodes used for the color filter manufacturing process.
Color Filter: Color filter creates colors for an image on LCD. The color filter is comprised of red, green, and blue pigment and is aligned with a particular subpixel within the cell.
Liquid Crystal: Liquid crystals change orientation under an applied electric field and can thereby block or pass light. The liquid crystals in an LCD display are in a naturally twisted form.
Touch Sensor: In-Cell sensors use existing display layers to construct the touch sensor matrix
3D Capacitive Sensor: In-Cell sensors use existing display layers to construct the 3D touch capacitive sensor matrix.
Thin Film Transistor: TFTs are micro-switching transistors (and associated capacitors) that are arranged in a matrix on a glass substrate to control each picture element (or pixel). TFTs help manipulate the voltage at each subpixel to orchestrate the display image.
Bottom Glass Substrate:
Special glass substrate with ITO electrodes used for the thin film transistor (TFT) manufacturing process.
Bottom Polarizing filter film with a horizontal axis to vertically polarize light as it enters. This filter only allows light waves in a vertical orientation to pass through, and rest of the light waves are blocked off.
Backlight: Liquid crystals do not generate light of their own, so another means of providing light is required to allow the screen to be viewed. HO3 utilizes the light source located to the side of the screen.
Common Electrode: is made from the transparent indium-tin-oxide (ITO) for applying the voltage to liquid crystal layer.
HCQS Exclusive HO3 3D In-Cell Touch LCD makes a brilliant alternative by addressing the growing needs for cost-effective high-performance smartphone applications with lower consumption and compact structure.
The HO3 3D In-Cell Touch LCD for iPhone 6S Plus, iPhone 7 Plus and iPhone 8 Plus are now available to order from HCQS (We plan to apply HO3 3D In-Cell Touch technology to more models in the near future). For update and more details, please feel free to contact HCQS sales representatives.
HCQS will continue to develop products that offer the best user experiences.