Help identify LCD - Page 1
Forum section: electronics / beginners

author: rks96
author_rank: Contributor
timestamp: October 24, 2022, 06:32:38 pm
content: I became the owner of trail camera HC-801A. Recently, LCD stopped working. I have been looking online for a fitting replacement. The LCD has LS20L01 written on it. Google returned absolutely nothing. Then I searched online based only by lcd size (2"), pin count (22) etc and comparing it visually. So I came up onhttps://www.aliexpress.com/item/4001233403114.html?spm=a2g0o.detail.1000014.2.fdeb5951eeO8M4&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.40050.281175.0&scm_id=1007.40050.281175.0&scm-url=1007.40050.281175.0&pvid=50055165-9bdc-462d-9b64-7d7ddd1f1a6b&_t=gps-id:pcDetailBottomMoreOtherSeller,scm-url:1007.40050.281175.0,pvid:50055165-9bdc-462d-9b64-7d7ddd1f1a6b,tpp_buckets:668%232846%238108%231977&pdp_ext_f=%7B%22sku_id%22%3A%2210000015393374804%22%2C%22sceneId%22%3A%2230050%22%7D&pdp_npi=2%40dis%21EUR%215.02%215.02%21%21%21%21%21%402103239c16665690899637432e5a51%2110000015393374804%21recBased on images provided by the seller, it looks like a 100% fit. I tested vcc/gnd pins and they matched with seller's provided information. However, there are 3 options: GC9201, ILI9225, ST7775R. How could I identify which one would fit my device? Camera uses JL2365A as main "CPU". Tried contacting the seller but there is no response.

author: bidrohini
author_rank: Regular Contributor
timestamp: October 25, 2022, 02:00:42 pm
content: Looks like none of the LCDs I am familiar with. Let's see if anyone recognizes this. If not, I think you'd better contact your seller.

author: Fraser
author_rank: Super Contributor
timestamp: October 25, 2022, 02:45:36 pm
content: This is a challenge that I have faced with a FLUKE thermal imaging camera that I have. Whilst an LCD panel and its FPC can match the one in the equipment, you can face the challenge of the MIPI standard. There can be different matrix controllers on the LCD panel and the correct one is needed. There is a way to determine which controller is in use.... monitor the serial uart engineering port on the equipment and look at the boot log to see what display driver is being used. The drivers name will identify the MIPI matrix controller. Sadly the hosts processor identity does not normally help as they are multi MIPI controller compatible and the LCD panel controller is selected in firmware.If the equipment does not have a serial UART port, or you cannot find it (not always obvious but check processors data sheet) you are somewhat stuck. Note that the LCD panel needs to be connected for the log file to show teh driver and hopefully your panes controller is still identifying itself to the host processor.https://www.mipi.org/specifications/dsiFraser

author: strawberry
author_rank: Super Contributor
timestamp: October 25, 2022, 06:27:43 pm
content: highly unlikely its MIPI (240x160) could be 8/16bit parallel interfaceis 50% compatibility chance for same brand controller (they place PON and data registers differently)connect logic analyzer to read what data it gives at power on (or at all)got dozen of these cameras for repair and no success (something about MCU power rail and charger IC failure....)

author: rks96
author_rank: Contributor
timestamp: October 25, 2022, 06:38:42 pm
content: Three options are LCD drivers.GC9201https://www.scribd.com/document/333470829/GC9201DS-V300-20130328ILI9225https://www.displayfuture.com/Display/datasheet/controller/ILI9225.pdfST7775Rhttps://www.bolymin.com.tw/uploadfiles/862/IC-Controller-Datasheet/st7775r_v0.1.pdfOn ST7775R page 11 you can see the controller IC in question. There is nothing of the size on the camera PCB, so the only possible location is on the LCD itself. So I checked and found this:thin silicone on bottom. clearly no markings and too hard to try work things out based on pinout. Maybe someone recognises logo after LS20L01:or maybe logo next to backlight "defuser".@Fraser pointed out working with UART, but there is no obvioes test pins and IC datasheet also isnt available online. I found only this:http://www.jeilin.com.tw/eng/product_detail.php?p_id=22

author: Fraser
author_rank: Super Contributor
timestamp: October 25, 2022, 07:08:19 pm
content: The matrix driver IC on my Fluke MIPI LCD panel looked the same as what you have shown but many Chip on Glass (COG) designs will look similar.In case they are of any interest, I attach my two threads detailing my journey with the FLUKE thermal camera LCD panel.For info, I found out that MIPI is popular with may modern LCD to processor designs as it is so common in the mobile phone and consumer electronics industry.https://www.eevblog.com/forum/thermal-imaging/fluke-tis10-thermal-camera-fraser-has-a-new-patient-)/msg2948320/#msg2948320https://www.eevblog.com/forum/beginners/replacing-an-unknown-rgb-lcd-panel-with-a-generic-type-advice-needed-please/msg3570055/#msg3570055Fraser